________ are attributes whose values are associated with one and only one entity instance.
A)Descriptors
B)Cardinalities
C)Dependencies
D)Identifiers

Question

Quizplus · Accepted Answer

Identifiers are attributes that uniquely identify an entity instance. They have a one-to-one correspondence with each entity instance, therefore their values are associated with only one entity instance. Descriptors describe an entity instance but are not necessarily unique to that instance. Cardinalities and dependencies are related to relationships between entities, not attributes.

________ Are Attributes Whose Values Are Associated with One and Only