When Selecting an Identifier,one Should

question 47

Multiple Choice

When selecting an identifier,one should:

• A)use intelligent keys
• B)use large composite keys instead of single-attribute surrogate keys
• C)choose a candidate key that will not change its value over the life of each instance of the entity type
• D)choose a candidate key such that for each instance of the entity,the attribute is guaranteed to have valid values or is null

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Definitions:

Describe

To give a detailed account or picture of a situation, event, pattern, or the like, in words.

Predict

The ability to foretell or forecast future events based on current data or observations.

Control

The power to influence or regulate people, events, or processes.

Critical Thinking

The process of actively and skillfully conceptualizing, analyzing, synthesizing, and evaluating information to reach an informed conclusion.