Dr. A.P.J. Abdul Kalam University MCA II Sem (3 Year) Data Base Management System [MCA202] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Computer Application

Second Semester Main Examination, June-2021

Data Base Management System [MCA202]

Time: 3:00 Hrs Max Marks 70

Note: (i) All questions carry equal marks

 (ii) Answer should be precise and to the point only.

 (iii) Assume suitable data if necessary and state them clearly

Q.1 (a) What is DBMS? Explain basic operation of DBMS? What are the

advantages of DBMS?

(b) DRAW E-R diagram for library management system and convert into set

of schema?

Q.2 (a) What is Normalization? Explain second normal form with the help of an

example.

(b) Draw an ER diagram for a small marketing company database. Assume

suitable data.

Q.3 (a) Define the concept of aggregation. Give several examples of where this

concept is useful.

(b) Explain deadlock prevention schemes?

Q.4 (a) What are the problems caused by data redundancies? Can data

redundancy be completely eliminated when a database approach is used?

(b) Explain the advantages and disadvantages of distributed database

Q.5 Define following: (i) Aggregation (ii)Check constraints (iii)dangling tuple

 problem locks.

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