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Logical Database Design

Logical Database Design
Weak entities do not get mapped into a relation.

False
True

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Logical Database Design
When mapping a multivalued attribute into a relation which of the following is true?

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

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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
The primary key in a relation does not need to be underlined.

False
True

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Logical Database Design
If a relation is in third normal form, it does not need to be in second normal form.

False
True

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Logical Database Design
A foreign key may be null and still adhere to the referential integrity constraint.

True
False

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