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Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. There are many screen size nowadays. From small size which is smart phone to big size which is television but the computer usually use the medium size of the monitor. The factor we need to consider for monitor when purchasing a the type of monitor.different type of computer monitor will give out different visual. All people will choose the clearly visual monitor to purchase. Besides this, the size of monitor also must consider .

e) Sound:Sound on the computer is one of the output from computer which perform by other device such as speaker, earphone and so on. In this case ,sound card play the important role in help the computer to perform its sound. A sound card (also known as an audio card) is(wikipedia4,2013) an internal computer expansion card which is attach on the motherboard that facilitates the input and output of audio signals to and from a computer under control of computer programs. The term sound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. The sound card is typical use to providing the audio component for multimedia applications such as editing video, playing game and so on.The factor we need to consider for sound when purchasing the computer is quality of the sound. Many people will choose the computer due to the soft sound which help them to relax. When the sound is too noisy ,many people will ignore the computer when choosing the computer.

f)Video Cards:Video card (also called display card, graphics card, graphics adapter) is (wikipedia5,2013)an expansion card which attach on motherboard that generates a feed of output images to a display. Most video cards include various functions such as accelerated rendering of 3D scenes and 2D graphics, TV output and so on. Beside this, video card also determine the graphic is clear or not.The factor that we need to consider for video card when purchasing a computer is the quality of output image. The output image must be clear and no blur . There are many graphic card in the market and the different video card will have different effect so we must choosing the good video card when purchasing the computer.

Question 2Answer:BIOS checking procedure at the time of booting a computerWhen turn on the computers,(WEBOPEDIA,2010) the CPU initializes itself, which is triggered by a series of clock ticks generated by the system clock. Part of the CPU's initialization is to look to the system's ROM BIOS for its first instruction in the startup program. The ROM BIOS stores the first instruction, which is the instruction to run the power-on self test (POST), in a predetermined memory address. POST begins by checking the BIOS chip and then tests CMOS RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU, checking the inventoried hardware devices (such as the video card), secondary storage devices, such ashard drives and floppy drives, ports and other hardware devices, such as thekeyboard and mouse, to ensure they are functioning properly.Once the POST has determined that all components are functioning properly and the CPU has successfully initialized, the BIOS looks for an OS to load.The BIOS typically looks to the CMOS chip to tell it where to find the OS, and in most PCs, the OS loads from the C drive on the hard drive even though the BIOS has the capability to load the OS from a floppy disk, CD or ZIP drive. The order of drives that the CMOS looks to in order to locate the OS is called the boot sequence, which can be changed by altering the CMOS setup. Looking to the appropriate boot drive, the BIOS will first encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program file that will initialize the OS.

Question 3Answer: Garbage in Garbage out (GIGO) is (Janssen, n.d) that a program gives inaccurate results due to inaccurate data enter to the program because a computer will always attempt to process data that we given to it. In another word, the quality of input enter to computer will determine the quality of output from computer. Garbage can be data that is simply filled with errors or wrong information, but it can also be data that doesn't have any applicability to the specific circumstance. For example, A company that is only sells to .NET developers. A CRM application might be able to determine the most likely targets from a batch of leads. However, if the leads were generated from a group of Java developers who have no interest in the product, the CRM application will produce useless results regardless of its logic. The solution is to not just spend time on an application's algorithms, but also spend time validating the input and/or ensuring that the right sort of data goes into the system.

Question 4Answer:Computer virus is a computer program that create with malicious intent and it will piggy on the real program such as Microsoft word, Database and so on. When the program which is piggyback by the virus was run, the virus will run too. This usually happen without the user being aware of it. A virus program(ITSC1,2002) is able to reproduce itself. This means that the virus multiplies on a computer by making copies of itself. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be infected by the same virus. In this case, it may hinder the computer for normal operation and/or create damage for the hard disk.

Three example of computer virus got (ITSC2,2002)file virus, boot sector virus and macro virus.File sector virus:(ITSC2,2002)A virus which is attaches itself to a file, usually a program file.Boot sector virus: (ITSC2,2002)These viruses infect floppy and hard drives. The virus program will load first, before the operating system.Macro virus: (ITSC2,2002)This is a new type of virus that use an application's own macro programming feature to distribute themselves. Unlike other viruses, macro viruses do not infect programs; they infect documents

Question 5Answer: system software is a program that control or maintain operation in a computer hardware and provide platform for running application software. (Jamal ,2012) It is a general purpose software on computer so it is essential for computer. Beside this , The number of system software that appear is less than application software and we hard to found the download sources from webpage . System software also can create his own environment to run itself and run other application. Moreover It executes all the time when the computer is on . Normally a system software will came with some utility program. For example: window, mac and Linux.Application software is a computer program that use to perform a specific task. (Jamal ,2012)It is a special purpose software on computer and it is not essential for computer operating. Beside this, the number of application software is many and we can go to the webpage download if we needed or some application software need license so we need to purchase on computer shop. Application software also performs in a environment which created by System/Operating System . Moreover It executes as and when required.For example: word processing, spreadsheet and database.

ReferencesBarizi web solution. n.d. Factors to consider when buying a computer. Barizi web solution: if you can imagine it, it can be done. Accessed November 20, 2013. http://www.bariziwebsolutions.com/articals/116-factors-to-consider-when-buying-a-computer.htmlITSC1. 2002. What is computer virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/whatis.htmlITSC2. 2002. Types of virus. ITSC:Information technology services center. October 23. Accessed November 20, 2013. http://www.ust.hk/ccst/antivirus/general/types.htmlJamal, Shakil. 2012. Tag Archives: Difference between System Software and Application Software.Shakil Jamals Blog:exploring experiences... . April 23. Accessed November 21, 2013. http://experiencewave.wordpress.com/tag/difference-between-system-software-and-application-software/Janssen, Cory. n.d. Garbage in Garbage out (GIGO). Techopedia. Accessed November 17, 2013. http://www.techopedia.com/definition/3801/garbage-in-garbage-out-gigoTeach-ICT.com. N.d. internal storage device. Teach-ICT.com.Accessed November 25 , 2013. http://www.teach-ict.com/gcse_new/computer%20systems/storage_devices/miniweb/pg3.htm WEBOPEDIA. 2010. The System Boot Process Explained. WEBOPEDIA:Everything you need to know is right here. September 1. Accessed November 27,2013 http://www.webopedia.com/DidYouKnow/Hardware_Software/2004/BootProcess.asp

Wikipedia1: the free encyclopedia. 2013. Central processing unit. Wikipedia: the free encyclopedia. November 19. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Central_processing_unitWikipedia2: the free encyclopedia. 2013. Motherboard. Wikipedia: the free encyclopedia. November 20. Accessed November 20, 2013. http://en.wikipedia.org/wiki/Motherboard

Wikipedia3: the free encyclopedia. 2013. Computer monitor. Wikipedia: the free encyclopedia. November 20. Accessed November 21, 2013. http://en.wikipedia.org/wiki/Computer_monitorWikipedia4: the free encyclopedia. 2013. Sound card. Wikipedia: the free encyclopedia. November 15. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Sound_card Wikipedia5: the free encyclopedia. 2013. video card. Wikipedia: the free encyclopedia. November 8. Accessed November 25, 2013. http://en.wikipedia.org/wiki/Video_card

Question 1Answer:a) CPU (Central processing unit):CPU as the brain of computer is (Wikipedia1, 2013) the hardware inside the computer that attach to the motherboard and carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. It also contain two typical components of a CPU which are arithmetic logic unit (ALU) and the control unit (CU) .The factors we need to consider for the CPU when purchasing a computer is the processor speed range. ( Barizi web solution, n.d) CPU speed is important to make sure that desktop or laptop operates maximally. It will be better when higher processor is use but this will need to paid additional cost.

b) Motherboard:

Motherboard (also known as main board,system board,planer board or logic board) is (Wikipedia2 ,2013) the main printed circuit board (PCB) found in computers and other expandable systems. It holds many electronic components of the system, such as the central processing unit (CPU) , memory, sound card, video card and so on . The factors we need to consider for the motherboard when purchasing a computer is the motherboard must have enough slot to attached component we prefer. This is depend on own preference. If more slot will needed, computer owner will purchase the motherboard with more slot.

c) External and Internal storage:Internal and external storage are the device the store the information.External storage is device that temporarily store information and no fix inside the computer. Sometime ,it also can help to transfer information from one computer to another computer such as CD, pen drive, DVD and so on. Internal storage is (Teach-ICT.com , n.d.)device that stay permanent inside the computer. Such as hard disk. At the most basic level, internal storage is needed to hold the operating system so that the computer is able to access input and output device. It will also be used to store the applications software and data files. Besides this, it also allow the data and applications to be loaded very rapidly into memory which ready for use.The factor we need to consider for internal and external storage when purchasing computer is size of storage. The bigger the storage,the better for us to store information or/and execute our program. When we are purchasing computer we must consider that the larger storage of the computer such as RAM or ROM.

d) Monitor:Computer monitor is(Wikipedia3,2013) an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display