MCA MAGADH UNIVERSITY QUESTION (2004-2007) (Third semester) Database Management systems

MCA MAGADH UNIVERSITY QUESTION (2004-2007) (Third semester) Database Management Systems
MCA MAGADH UNIVERSITY QUESTION (2004-2007) (Third semester) Database Management systems

                                                                    2004-2007
                                                                 Full marks: 80
                                                                Time : 4 hours
                                                      Answer any five questions.

1. (a) Give the advantages of organizing a large volume of data as a database.
    (b) Give the Components of a DBMS and outline their roles.
    (c) Briefly explain the idea of data independence.
    (d) " Data Dictionary is structured repository of data about data". Explain.

2. (a) what are the main functions of a database administration? 
    (b) Explain and concepts of aggregation and generalization and example in each case.


3. (a) Define and illustrate the relational algebra operators. Union set difference, selection and projection.
    (b) Explain loss less- join decomposition and the idea of dependency reservation.

4. Normalization theory is built around the concept the normal forms. A relation is said to be in particular normal forms if it satisfies a certain specified set of constraints. Discuss  various normal forms giving example.

5. Explain following:
    (a) Serializability 
    (b) Two- phase licking protocol
    (c) Deadlock

6. (a) Define mapping cardinalities and existence dependencies and explain with example.
    (b) Draw E-R diagram for the following education database
          course ( Course #, title )
          Offering ( Course #, off, offdata, location)
          Teacher ( Course#, off emp#, grade)
           Employee ( emp#, ename, job)

7. (a) Discuss HSAM, HISAM, HDAM and HIDAM.
    (b) State and explain Armstrongs axioms.

8. (a) Give the structure and concept of network database.
    (b) Explain how can the security be maintained in a database system.

9. (a) Explain the recovery procedure that needs to take place after a disk crash.
    (b)  Give an algorithm for testing dependency preservation.

10. Write notes on any two of the following:
      (a) Data mining 
      (b) Data ware housing
      (c) SQL  server
      (d) Functional dependencies.


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