1) describe insertion, deletion and modification anomalies. Why are they considered bad? Demonstrate with exs"

2) What do you mean by the completeness and soundness of Armstrong's inference rules?

3) What do you mean by the concurrent execution of database transactions in a multi-user system? describe why concurrency control is needed and give informal exs.

4)(a) describe the four levels of isolation in SQL.

(b) What do you mean by security threat? Describe various security threats.

5)a) What do you mean by database? What is main key?

b) What do you mean by data mining?

6) What are homogeneous distributed databases?

7) What are the disadvantageous of network model?

8) Define the various types of attributes in E-R model.

9) prepare down the difference between the random access and sequential access?

10) What do you mean by database integrity?