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MCQ

Q.

An attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation.

A

Candidate

B

Primary

C

Super

D

Sub

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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.

A relational database developer refers to a record as

A

a criteria.

B

a relation.

C

a tuple.

D

an attribute.

Discussion

MCQ

3.

The ___________ operation, denoted by -, allows us to find tuples that are in one relation but are not in another.

A

Union

B

Set difference

C

Difference

D

Intersection

Discussion

MCQ

4.

The number of attributes in relation is called as its

A

Cardinality

B

Degree

C

Tuples

D

Entity

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5.

Cartesian product in relational algebra is

A

a Unary operator.

B

a Binary operator.

C

a Ternary operator.

D

not defined.

Discussion

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