ER MODEL AND BUSINESS RULES QUIZ

Action

Corresponding object

All of these

Anchor object

False

True

Diamond

Circle

Rectangle

Oval

Entity

Relationship

Attribute

Optional One

True

False

Each subtype has only one attribute.

Each supertype has only one subtype.

Each subtype has only one supertype.

Each supertype has only one attribute.

Subtypes at the lower lever in the hierarchy inherit attributes only from their immediate supertype.

Subtypes at the higher lever in the hierarchy inherit attributes only from their immediate subtype.

Attributes are assigned at the highest logical level.

Attributes are assigned at the lowest logical level.

True

False

Disjoint with partial specialization

Overlap with total specialization

Disjoint with total specialization

Overlap with partial specialization

True

False