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MCQ

Q.

The intersection operator is used to get the _____ tuples.

A

Different

B

Common

C

All

D

Repeating

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MCQ

1.

A ________ is a pictorial depiction of the schema of a database that shows the relations in the database, their attributes, and primary keys and foreign keys.

A

Schema diagram

B

Relational algebra

C

Database diagram

D

Schema flow

Discussion

MCQ

2.

Which of the following operation is used if we are interested in only certain columns of a table?

A

PROJECTION

B

SELECTION

C

UNION

D

JOIN

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 _______operation performs a set union of two

A

Union

B

Join

C

Product

D

Intersect

Discussion

MCQ

5.

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

A

Name

B

Street

C

Id

D

Department

Discussion

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