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 the data.

Question

Quizplus · Accepted Answer

A data model is a logical representation of the structure of the data, including the relationships among entities and the attributes associated with those entities. Option A is incorrect because a data model is created during the database design process. Option B is incorrect because a unique attribute value is called a primary key, but not all attributes are primary keys. Option D is incorrect because describing relationships among data is an essential part of creating a data model.

Which of the Following Is True of a Data Model