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O Level Computer Studies 7010/01 Study Guide

Page 1

O Level Computer Studies 7010/01 Study Guide

Past Y ear Termi nol ogi esTerminologies asked in Past Years Cambridge O Levels PapersS. No. 1. 2. 3. 4. 5. 1. 2. 3. 4. 5. 1. 2. 3. 4. 5. 1. 2. 3. 4. 5. 1. 2. 3. 4. 5. 6. 7. June 2008 Batch processing Interrupt Top-down design Laptop computer Trackerball November 2006 Verification Video-conferencing Handshaking Simulation Batch processing June 2005 Buffer Gateway Validation Polling Data-logging November 2003 Buffer Verification Gigabyte Batch processing File generations June 2002 Multimedia Array De-skilling Expert system Verification November 2007 Byte CD-ROM Interrupt Buffer Virtual reality June 2006 Smart Card Relational database ROM De-skilling Top-down design November 2004 MICR Batch processing Modem Virus Interrupt June 2003 Check sum Relational database Random access mem ory (RAM) Top-down design Alphanumeric characters November 2001 Robot Online processing Buffer Modem Simulation June 2007 Virus Verification Interrupt Simulation Electronic scabbing November 2005 Expert system Electronic scabbing Top-down design Interrupt Buffer June 2004 Byte Compiler Handshaking Technical documentation Simulation November 2002 Data logging Check digit Serial access Assembler Handshaking June 2001 MICR Handshaking Polling Batch processing GUI

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O Level Computer Studies 7010/01 Study Guide

S. No. 1. 2. 3. 4. 5. 6. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 8. 9. 10. 11. 12. 13. 14. 15. 16.

June 2000 Macro Buffer File generations Polling Systems design Nov 1997 Digital data User documentation OCR Assembler Validation Mailbox Polling

June 1999 RAM Fax Validation User documentation Interrupt Virtual reality June 1997 Kilobyte (KB) String data Batch processing Hand-shaking Multimedia Top-down design

June 1995 Bit ROM Hacking Megabyte Analogue data PIN Key field Bar code File generations Icons Numeric data Control character Multiprogramming Computer -aided design Desktop publishing Electronic mail June 1991 Amendments Insertions Deletions Step-wise refinement Electronic mail Repetition Selection

June 1993 Buffer String Merging Rogue value User documentation

June 1998 Kilobyte (KB) Alphanumeric data Serial Access Hand-shaking Multimedia Simulation June 1996 Virus Data type Buffer Technical documentation Simulation Assembler RAM Modem Bar code Algorithm Process control Interpreter June 1992 Real time processing Buffer Touch-sensitive pad

June 8th 1990 Buffer LAN Sequential file Direct-access file

June 20th 1990 Verification Interpreter assembler

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O Level Computer Studies 7010/01 Study Guide

June 2008 Batch processing: It is the data processing in which (processing) doesn't start until all data is collected in which there is no need for human interaction and it uses computer during "quiet" time/overnight. Interrupt: A signal/message generated by a device/operating system/hardware/software which causes a break in the execution of a program/stops running of program. Examples: overflow errors, disk full error, printer out of paper error etc. Top-down design: A design produced with breaking down the problem/task/program into sub problems/smaller tasks/modules, it is the stepwise refinement of the problem. Laptop computer: It is a portable computer system that can be used anywhere. It has integrated keyboard/screen/pointing device and uses a battery/mains power not required Trackerball: A pointing device that consists of a ball resting on two rollers at right angles to each other, which translate the balls motion into vertical and horizontal movement on the screen. A trackball also typically has one or more buttons to initiate other actions. A trackballs housing is stationary; its ball is rolled with the hand. . November 2007 Byte: Short for binary term. A unit of data, today almost always consisting of 8 bits. A byte can represent a single character, such as a letter, a digit, or a punctuation mark. CD-ROM: Acronym for compact disc read-only m emory. A form of storage characterized by high capacity (roughly 650 megabytes) and the use of laser optics rather than magnetic means for reading data. Interrupt: A signal/message generated by a device/operating system/hardware/software which causes a break in the execution of a program/stops running of program. Examples: overflow errors, disk full error, printer out of paper error etc. Buffer: Temporary store/memory that holds data being transferred between devices often used to compensate for different speeds of devices examples printer, disk, etc Virtual reality: A simulated 3-D environment that a user can experience and manipulate as if it were physical. The user sees the environment on computer simulation, possibly mounted in a special pair of goggles. Special input devices, such as gloves or suits fitted with motion sensors, detect the user's actions. e.g. design of chemical plants.

June 2007 Virus: An intrusive program that infects computer files by inserting in those files copies of itself. The copies are usually executed when the file is loaded into memory, allowing them to infect still other files, and so on. It alters/damages files/alters files or data

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O Level Computer Studies 7010/01 Study Guide

Verification: It is checking to make sure that data has been entered correctly. Verification is often carried out by getting two users to enter the same set of data at different computers. Once both users have entered the data the two sets of data are compared to check that they match up. Any data that does not match up is rejected. Verification can also be carried out by software which might, for example, ask for the same data to be entered twice. If both entries don't match up the data is rejected. Interrupt: A signal/message generated by a device/operating system/hardware/software which causes a break in the execution of a program/stops running of program. Examples: overflow errors, disk full error, printer out of paper error etc. Simulation: To study the behaviour of a system by using a model/represents real life/mathematical representation. Results can be predicted using a simulation program. e.g. flight simulator, modelling hazardous chemical reaction Electronic scabbing: allows managers to switch (word processing/computer processing duties) from striking clerks in one country/location to non-striking clerks in another country/location.

November 2006 Verification: It is checking to make sure that data has been entered correctly. Verification is often carried out by getting two users to enter the same set of data at different computers. Once both users have entered the data the two sets of data are compared to check that they match up. Any data that does not match up is rejected. Verification can also be carried out by software which might, for example, ask for the same data to be entered twice. If both entries don't match up the data is rejected. Video-conferencing: The use of a computer to send sound and video images from one computer to another in real time is called video-conferencing. Handshaking: A series of signals acknowledging that communication or the transfer of information can take place between computers or other devices. A hardware handshake is an exchange of signals over specific wires (other than the data wires), in which each devic e indicates its readiness to send or receive data. A software handshake consists of signals transmitted over the same wires used to transfer data, as in modem-to-modem communications over telephone lines. Simulation: The imitation of a physical process or object by a program that causes a computer to respond mathematically to data and changing conditions as though it were the process or object itself. OR The study of a real life situation by means of a working model is called simulation.

Batch processing: The practice of acquiring programs and data sets from users, running them one or a few at a time, and then providing the results to the users. OR The practice of storing transactions for a period of time before they are posted to a master file, typically in a separate operation undertaken at night.

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O Level Computer Studies 7010/01 Study Guide

June 2006 Smart Card: In banking and finance, a credit card that contains an integrated circuit that gives it a limited amount of intelligence and memory. Relational database: A database or database management system that stores information in tables-rows and columns of data-and conducts searches by using data in specified columns of one table to find additional data in another table. In a relational database, the rows of a table represent records (collections of information about separate items) and the columns represent fields (particular attributes of a record). In conducting searches, a relational database matches information from a field in one table with information in a corresponding field of another table to produce a third table that combines requested data from both tables. ROM: Acronym for read-only memory. A semiconductor circuit into which code or data is permanently installed by the manufacturing process. De-skilling: A change/update of systems in which skilled/semi skilled labour replaced by microprocessor-controlled systems e.g. manufacturing, office work Top-down design: breaking down the problem/task/program into sub problems/smaller tasks/modules - stepwise refinement.

November 2005 Expert system: A software that contains/programmed with the knowledge of human experts knowledge base inference engine uses rules/rule base man/machine interface ability to add to its knowledge/learn from previous experience examples: chess, medical diagnosis, mineral prospecting, car diagnostics, tax calculations, etc. Elect

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