Database - ER Model and Business Rules

Exercise :: ER Model and Business Rules - True or False

1. 

Packaged data models are meant to be exactly right straight out of the box.

A. True
B. False

Answer: Option B

Explanation:

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2. 

An action assertion is a statement that expresses some aspect of the static structure of the organization.

A. True
B. False

Answer: Option B

Explanation:

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3. 

A supertype can only have only one subtype.

A. True
B. False

Answer: Option B

Explanation:

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4. 

There is cardinality on an EER between the supertype and subtype.

A. True
B. False

Answer: Option B

Explanation:

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5. 

A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).

A. True
B. False

Answer: Option A

Explanation:

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