Database - Data Modeling with ER Model

Exercise :: 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

Answer: Option B

Explanation:

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2. 

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

A. True
B. False

Answer: Option B

Explanation:

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3. 

All instances of an entity class have the same attributes.

A. True
B. False

Answer: Option A

Explanation:

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4. 

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

A. True
B. False

Answer: Option B

Explanation:

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5. 

An attribute describes the entity's characteristics.

A. True
B. False

Answer: Option A

Explanation:

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