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MCQ

Q.

Which is a join condition contains an equality operator:

A

Equijoins

B

Cartesian

C

Natural

D

Left

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MCQ

1.

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

2.

The union operation is represented by

A

?

B

U

D

*

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

Discussion

MCQ

4.

A

? t ? r (Q(t))

B

? t ? r (Q(t))

D

~ t ? r (Q(t))

Discussion

MCQ

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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