ER MODEL

An entity is a

• object of relation

• present working model

• thing in real world

• model of relation

Which of the following is not a component of ER Model in DBMS?

• entity

• database

• attribute

• relationship

A relationship is

• an item in an application

• a meaningful dependency between entities

• a collection of related entities

• a related data

The expansion of ER Diagram is

• Entity Relationship diagram

• Entity Relative diagram

• Entity Relation diagram

• Entity Rationalized diagram

Entity is represented as

• ellipse

• double ellipse

• rectangle

• double rectangle

In one to many relationship, the entity that is on the one side of relationship is called

• subtype

• child

• instance

• parent

Property that describes the characteristics of entity is

• entities

• relationship

• attributes

• identifiers

Entities can be associated with one another in which of the following

• attribute

• identifiers

• entities

• relationship

By relation cardinality we mean

• number of items in a relationship

• number of relationships in which an entity can appear

• number of items in an entity

• number of entity sets which may be related to a given entity

If an entity appears in N relationship then it is

• a 1:1 relationship

• a 1:N relationship

• a N:1 relationship

• a N:M relationship