Logical Database Design

Logical Database Design
A primary key may be null.

True

False

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Logical Database Design
If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?

First normal form

Fourth normal form

Second normal form

Third normal form

First normal form

Fourth normal form

Second normal form

Third normal form

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Logical Database Design
Normalization is a formal process for deciding which attributes should be grouped together in a relation.

False

True

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Logical Database Design
If no multivalued attributes exist in a relation, then the relation is in what normal form?

Second normal form

Fourth normal form

Third normal form

First normal form

Second normal form

Fourth normal form

Third normal form

First normal form

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Logical Database Design
A synonym is two or more attributes that have different names but the same meaning.

False

True

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

False

True

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