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Logical Database Design

Logical Database Design
The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities.

False
True

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Logical Database Design
When mapping a binary many-to-many relationship into a relation which of the following is true?

Three relations are created.
Two relations are created.
One relation is created.
Four relations are created.

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Logical Database Design
A foreign key is which of the following?

An attribute that serves no purpose
Any attribute
The same thing as a primary key
An attribute that serves as the primary key of another relation

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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
Third normal form
Second normal form
Fourth normal form

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Logical Database Design
The entity integrity rule states that:

no primary key attribute may be null.
no primary key can be composite.
no primary key may be equal to a value in a foreign key.
no primary key may be unique.

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Logical Database Design
The relational model consists of:

data in the form of tables.
operations using non-SQL languages.
data redundancy.
unorganized data.

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