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MCQ

Q.

The ______ is the one in which the primary key of one relation is used as a normal attribute in another relation.

A

Referential relation

B

Referencing relation

C

Referenced relation

D

Referred relation

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MCQ

1.

For select operation the ________ appear in the subscript and the ___________ argument appears in the paranthesis after the sigma.

A

Predicates, relation

B

Relation, Predicates

C

Operation, Predicates

D

Relation, Operation

Discussion

MCQ

2.

Which one of the following attribute can be taken as a primary key?

A

Name

B

Street

C

Id

D

Department

Discussion

MCQ

3.

An entity set that does not have sufficient attributes to form a primary key is a

A

strong entity set.

B

weak entity set.

C

simple entity set.

D

primary entity set.

Discussion

MCQ

4.

. Which of the following operations need the participating relations to be union compatible?

A

UNION

B

INTERSECTION

C

DIFFERENCEqq

D

All of the above

Discussion

MCQ

5.

Which one of the following cannot be taken as a primary key?

A

Id

B

Register number

C

Dept_id

D

Street

Discussion

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