Database Management System.pdf - Google Drive

2 downloads 166 Views 440KB Size Report
Sign in. Loading… Whoops! There was a problem loading more pages. Retrying... Whoops! There was a problem previewing t
PG – 532

*PG532*

I Semester M.Sc. Degree Examination, January/February 2014 (Y2K5 Scheme) COMPUTER SCIENCE MCS-103 : Database Management System Time : 3 Hours

Max. Marks : 80

Instruction : Answer any five questions, choosing atleast two from each Part. PART – A 1. a) Define DBMS. Explain the various applications of DBMS.

8

b) Explain the differences between File Processing System and Database System.

8

2. a) Explain different indexing techniques.

8

b) Draw an E-R diagram for Employee Management System.

8

3. a) Explain the basic relational algebra with examples.

8

b) Explain different types of views in SQL with suitable illustrations.

8

4. a) Consider the following relational schema and briefly answer the questions that follow : Emp (eid : integer, ename : string, age : integer, salary : real) Work (eid : integer, did : integer, pct-time : integer) i) Define a table constraint on employee that will ensure that every employee makes atleast 10,000/-. ii) Define a table constraint on department that will ensure that all managers have age > 30. iii) Write SQL statement to delete all information about employees whose salaries exceed that of manager one or more department that they work in. b) Explain the Object Oriented Data Model.

8 8

P.T.O.

*PG532*

PG – 532 PART – B

5. a) What is normalization ? Explain 2NF and 4NF with an example for each. b) Explain DDL and DML commands with examples.

8

6. a) Why database failure occurs ? How to recover the data from such failures ? Explain the various recovery techniques in detail. b) Define concurrency control. Explain multi version concurrency control techniques.

b) What is Database Security ? Explain the role of DBA in Database Security.

i) Database encryption ii) Referential integrity iii) Schema iv) Weak Entity Vs Strong Entity. ———————

8 8

7. a) What is distributed database ? Explain the architecture of distributed database system.

8. Write short notes on the following :

8

8 8

(4×4=16)