How many types of entities?
a) one
b) two
c) three
d) four
Explanation: entity type, entity instance, entity set
A set of entities with same attributes is called…
a) entity type
b) entity instance
c) entity set
d) all of these
A set of all possible values for an attribute is called…….
a) entity type
b) entity instance
c) entity set
d) attribute domain
A member of an entity class is called…
a) entity type
b) entity instance
c) entity set
d) all of these
A set of all entities of a particular entity type in the database at a given point of time is called….
a) entity type
b) entity instance
c) entity set
d) all of these
An entity that can exist only if another entity exist is known as……
a) entity type
b) weak entity
c) entity set
d) strong entity
