Which of the following is true of a data model?
A)It is created after the database is designed.
B)It is an attribute whose value is associated with only one entity instance.
C)It is a logical representation of the structure of the data.
D)It does not describe the relationships among data.

Question

Quizplus · Accepted Answer

A data model is a logical representation of the structure of the data, including the relationships among entities and attributes. Option A is incorrect because data model is created as part of the database design process. Option B is incorrect because a unique attribute can be associated with more than one entity instance. Option D is incorrect because one of the main purposes of a data model is to describe relationships among data.

Which of the Following Is True of a Data Model