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MCQ

Q.

If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has

A

Hierarchy

B

Multilevel inheritance

C

Single inheritance

D

Multiple inheritance

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MCQ

1.

Database __________ which is the logical design of the database, and the database _______ which is a snapshot of the data in the database at a given instant in time.

A

Instance, Schema

B

Relation, Schema

C

Relation, Domain

D

Schema, Instance

Discussion

MCQ

2.

The tuples of the relations can be of ________ order.

A

Any

B

Same

C

Sorted

D

Constant

Discussion

MCQ

3.

The completeness constraint may be one of the following: Total generalization or specialization, Partial generalization or specialization. Which is the default?

A

Total

B

Partial

C

Should be specified

D

Cannot be determined

Discussion

MCQ

4.

In E-R diagram generalization is represented by

A

Ellipse

B

Dashed ellipse

C

Rectangle

D

Triangle

Discussion

MCQ

5.

For a weak entity set to be meaningful, it must be associated with another entity set, called the

A

Identifying set

B

Owner set

C

Neighbour set

D

Strong entity set

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