mi0034 database management system 3rd sem mba spring 2015 smu solved assignments
DESCRIPTION
Dear students to get solved assignments of SMU MBA SPRING 2015 call us at 8510092683 or mail us at [email protected]TRANSCRIPT
MI0034 DATABASE MANAGEMENT SYSTEM
Dear students to get solved assignments of SMU MBA SPRING 2015 call us at 8510092683 or mail us at [email protected]. Write short notes on:
a. Latency and seek
Answer: Latency is the time delay that exists between the moment that read/write command is initiated over the physical interface of the drive and the moment where the desired information is placed.
b. RAID
Answer: RAID stands for Redundant Array of Inexpensive Disks. In order to balance the I/O load you have to equate the database files across all the disk drives. Therefore, maintaining of individual disk drives in large number is cumbersome. For the sake of simplification of this task, RAID was introduced. c. Blu-ray Disk drive
Blu-ray Disk (BD) is the advanced version of DVD which is made out of smaller pits and lands. Single-layer BD can store about more than five times the DVD capacity (almost 25 billion bytes) and double-layer BD can store up to 50 billion bytes. It is so named because it uses blue-violet laser light to read or write the data from the disk. d. Variable length records
If different records in the file have different sizes, the file is said to be made up of variable length records. The variable length field is a field whose maximum allowed length would be specified. When the actual length of the value is less than the maximum length, the field will take only the required space. In the case of fixed length fields, even if the actual value is less than the specified length, the remaining length will be filled with spaces of null values.
Dear students to get solved assignments of SMU MBA SPRING 2015 call us at 8510092683 or mail us at [email protected]. Explain various forms of Normalization with an example of employee database. (Constructing an un-normalized normal form, Converting the un-normalized normal form to different normal forms with an explanation) 2, 8
Answer:
According to R. Elmasri and S.B. Navathe, normalisation is a process of analysing the given relation schemas based on their functional dependencies and primary keys to achieve the two desirable properties mentioned below:Q3. Elaborate the different types of schema-based constraints. 10
Answer: schema-based constraints: Now we will concentrate on the different types of schema-based constraints, and they are as follows:
Dear students to get solved assignments of SMU MBA SPRING 2015 call us at 8510092683 or mail us at [email protected]
Q4. Write SQL commands for the following queries.
a. List all the employees from an employee database whose salary falls in the range from Rs. 25,000 to Rs. 35,000
b. b. If there are two tables STUDENT and SUBJECT, display the list of students who have opted for computer subject.
c. c. Display the name of the highest scorer in the class.d. d. For every project located in “London”, list the project number, the
controlling department number and the department manager’s last name, address and birth date.
Answer:
Q5. a. List the advantages of Distributed Database Management System (DDBMS), b. List the disadvantages of DDBMS, c. What is data fragmentation and data replication?
Answer: Advantages and Disadvantages of DDBDDBs have certain advantages and disadvantages.
Advantages
Q6. Write short notes on:
a. Inheritance
Answer: Inheritance is a way of defining relationships among objects. As the name indicates, inheritance tells us that an object is able to inherit characteristics from another object. In more detail, we can say that an object is capable of acquiring the state and behaviour of its parent object. The objects will have common behaviours so that inheritance works.
b. Relationships
Answer:c. Object classes
d. Object Relational Database Management System
Dear students to get solved assignments of SMU MBA SPRING 2015 call us at 8510092683 or mail us at [email protected]