A Column in a Relational Table/database That Serves as a Unique

question 21

Multiple Choice

A column in a relational table/database that serves as a unique identifier is called a __________.

• A) primary key
• B) foreign identifier
• C) foreign key
• D) primary identifier

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Definitions:

Physical Stimulation

External stimuli or forces that impact the body, potentially causing physiological responses or sensations.

Difference Threshold

the minimum amount of difference required between two sensory stimuli before an individual can perceive that the two stimuli are indeed different.

Absolute Threshold

The absolute threshold refers to the smallest level of stimulus intensity needed for the stimulus to be correctly detected at least half the time.

Difference Threshold

The minimum difference in stimulation that a person can detect 50 percent of the time, also known as the just noticeable difference.