ER MODEL AND BUSINESS RULES QUIZ

True

False

True

False

Overlap with partial specialization

Overlap with total specialization

Disjoint with partial specialization

Disjoint with total specialization

False

True

False

True

True

False

No attributes apply to any of the instances of an entity type.

An instance of a subtype participates in a relationship that is the same as the other subtypes.

Attributes apply to all of the instances of an entity type.

An instance of a subtype participates in a relationship that is unique to that subtype.

False

True

False

True

When a subtype entity inherits values of another subtype attribute

When a subtype entity inherits values of the supertype attribute

When a supertype entity inherits values of another supertype attribute

When a supertype entity inherits values of the subtype attribute