An Attribute That Appears as a Nonkey Attribute in One

question 303

Multiple Choice

An attribute that appears as a nonkey attribute in one relation and as a primary key attribute (or part of a primary key) in another relation is a:

• A) foreign key.
• B) candidate key.
• C) pointer.
• D) relationship key.
• E) marker.

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Definitions:

Control Group

In experimental research, the group of subjects that does not receive the treatment being tested, serving as a benchmark for measuring the effect of that treatment.

Experimental

Pertaining to or based on experiments, which are structured and controlled tests or investigations to establish or test a hypothesis.

Placebo

An inert or non-effective substance or treatment given to a participant in a study, used to contrast with an active substance to test its efficacy.

Test

An assessment or examination intended to measure a test-taker's knowledge, skill, aptitude, physical fitness, or classification in many other topics.