ER-Model

Question 24

The constraint that specifies the number of entities to which another entity can be associated via
a relationship set in E-R model is referred as

A	Mapping cardinality
B	Entity integrity
C	Domain integrity
D	Assertion

Database-Management-SystemER-ModelHCU PHD CS MAY 2019

Question 24 Explanation:

In a Relationship, Participation constraint specifies the existence of an entity when it is related to another entity in a relationship type. It is also called minimum cardinality constraint. This constraint specifies the number of instances of an entity that can participate in a relationship type

Correct Answer: A

Question 24 Explanation:

In a Relationship, Participation constraint specifies the existence of an entity when it is related to another entity in a relationship type. It is also called minimum cardinality constraint. This constraint specifies the number of instances of an entity that can participate in a relationship type