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MCQ

Q.

In E-R Diagram relationship type is represented by

A

Ellipse

B

Dashed ellipse

C

Rectangle

D

Diamond

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MCQ

1.

What is a relationship called when it is maintained between two entities?

A

Unary

B

Binary

C

Ternary

D

Quaternary

Discussion

MCQ

2.

_____________ express the number of entities to which another entity can be associated via a relationship set.

A

Mapping Cardinality

B

Relational Cardinality

C

Participation Constraints

D

None of the mentioned

Discussion

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3.

If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has

A

Hierarchy

B

Multilevel inheritance

C

Single inheritance

D

Multiple inheritance

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4.

The term _______ is used to refer to a row.

A

Attribute

B

Tuple

C

Field

D

Instance

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5.

A window into a portion of a database is

A

Schema

B

View

C

Query

D

Data dictionary

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