Question

Each entity type in the E-R diagram becomes a relation. The identifier of the entity type becomes the ________ of the relation, and other attributes of the entity type become non-primary key attributes of the relation.

A) Foreign key
B) Index
C) Unique key
D) Primary key

Answer 1

Each entity type in the E-R diagram becomes a relation. The identifier of the entity type becomes the primary key of the relation, and other attributes of the entity type become non-primary key attributes of the relation.

Thus the corret opction is:d

Step-by-step explanation:

In an Entity-Relationship (E-R) diagram, each entity type becomes a relation in a relational database.

The identifier of the entity type becomes the primary key of the relation, which uniquely identifies each row in the table.

The other attributes of the entity type become non-primary key attributes of the relation, meaning they are regular attributes that provide additional information about each row.