What Are the Keywords CHECK, UNIQUE, and NOT NULL Referred

question 13

Multiple Choice

What are the keywords CHECK, UNIQUE, and NOT NULL referred to as?

• A)limits
• B)keys
• C)constraints
• D)references

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Definitions:

Likert Scale

A psychometric scale commonly used in questionnaires to obtain the preferences or degrees of agreement of respondents to a statement.

Dichotomous

Referring to a division or contrast between two completely opposite groups or things.

Independent Variable

In scientific experimentation, it is the variable that is manipulated or changed to test its effects on the dependent variable.

Dependent Variable

In an experiment or study, the variable that is tested and measured to see if it is affected by changes in another variable (the independent variable).