ER MODEL AND BUSINESS RULES QUIZ

When a supertype entity inherits values of the subtype attribute

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

False

True

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.

Oval

Diamond

Rectangle

Circle

Integrity Control

Authorization

Condition

Enabler

True

False

True

False

Each subtype has only one attribute.

Each subtype has only one supertype.

Each supertype has only one attribute.

Each supertype has only one subtype.

Specific to the organization

Concise

All of these

A singular noun

False

True