Database - Logical Database Design

Exercise :: Logical Database Design - True or False

1. 

An enterprise key is a primary key whose value is unique for a given relation.

A. True
B. False

Answer: Option B

Explanation:

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2. 

A composite attribute does not get mapped into a relation.

A. True
B. False

Answer: Option A

Explanation:

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3. 

A relation is a two-dimensional table.

A. True
B. False

Answer: Option A

Explanation:

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4. 

Weak entities do not get mapped into a relation.

A. True
B. False

Answer: Option B

Explanation:

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5. 

A primary key may be null.

A. True
B. False

Answer: Option B

Explanation:

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