Data Modeling with ER Model – True or False

1. An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

A. True
B. False

Correct Answer:  B. False

2. A ternary relationship is so called because in contains two entities and one association between them.

A. True
B. False

Correct Answer:  B. False

3. All instances of an entity class have the same attributes.

A. True
B. False

Correct Answer:  A. True

4. A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.

A. True
B. False

Correct Answer:  B. False

5. An attribute describes the entity’s characteristics.

A. True
B. False

Correct Answer:  A. True

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