A relationship that has a cardinality constraint of one or more is a(n) _______ relationship.
A)mandatory
B)optional
C)unary
D)binary

Question

A relationship that has a cardinality constraint of one or more is a(n)  _______ relationship.​
A)mandatory
B)​optional
C)unary
D)binary​

Quizplus · Accepted Answer

A cardinality constraint of one or more means that the relationship is mandatory, as there must be at least one instance of the related entity for each instance of the primary entity. "Optional" (B) would refer to a relationship where there may or may not be a related entity for each instance of the primary entity. "Unary" (C) would refer to a relationship where there is only one entity involved (such as a person and their birthdate). "Binary" (D) refers to a relationship between two entities.

A Relationship That Has a Cardinality Constraint of One or More