ER MODEL AND BUSINESS RULES QUIZ

False

True

False

True

True

False

Rectangle

Oval

Diamond

Circle

Relationship

Attribute

Entity

Optional One

Defining one or more supertypes of the subtype and forming supertype/subtype relationships.

Defining one or more subtypes of the supertype and forming supertype/subtype relationships.

Defining one or more supertypes of the subtype and not forming supertype/subtype relationships.

Defining one or more subtypes of the supertype and not forming supertype/subtype relationships.

Condition

Integrity Control

Authorization

Enabler

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

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

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

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

True

False

Each supertype has only one attribute.

Each subtype has only one attribute.

Each subtype has only one supertype.

Each supertype has only one subtype.