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Q.

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

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MCQ

1.

. 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

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.

This query displays

A

Only tuples from second part

B

Only tuples from the first part which has the tuples from second part

C

Tuples from both the parts

D

Tuples from first part which do not have second part

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MCQ

4.

Which is a unary operation:

A

Selection operation

B

Primitive operation

C

Projection operation

D

Generalized selection

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5.

The most commonly used operation in relational algebra for projecting a set of tuple from a relation is

A

Join

B

Projection

C

Select

D

Union

Discussion

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