When Designing a Database,one of the Candidate Keys in a Relation

question 99

Multiple Choice

When designing a database,one of the candidate keys in a relation is selected as the ________.

• A)composite key
• B)primary key
• C)foreign key
• D)surrogate key
• E)dependency

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Definitions:

Vulnerability

The quality or state of being exposed to the possibility of being attacked or harmed, either physically or emotionally.

Vascular Headaches

A category of headaches believed to be related to the dilation or constriction of blood vessels in the head, such as migraines.

Tension Headaches

Pain produced by sustained muscle contractions in the neck, shoulders, scalp, and face, as well as by activity in the central nervous system.

Stress

A state of mental or emotional strain or tension resulting from adverse or demanding circumstances.