An attribute(s) that acts as a foreign key in a relation ____.
A) must be the entire primary key of that relation
B) cannot be part of the primary key of that relation
C) may be part of the primary key of that relation
D) must also be a foreign key in another relation of the database
E) None of the above.

Question

Quizplus · Accepted Answer

An attribute that acts as a foreign key in a relation may also be part of the primary key of that relation, but it is not required to be the entire primary key. It can also be part of the primary key of another relation in the database. Therefore, option C is the correct answer.

An Attribute(s) That Acts as a Foreign Key in a Relation