Which of the Following Fields Is a Likely Primary Key

question 76

Multiple Choice

Which of the following fields is a likely primary key in a student information record?

• A) Last name
• B) Date of birth
• C) Student ID number
• D) First name

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Definitions:

Extraneous Solutions

Solutions that are derived during the process of solving an equation but do not satisfy the original equation.

Equation

A mathematical statement asserting the equality of two expressions, typically involving variables, and solved to find the values of those variables.

Reciprocal

The multiplicative inverse of a number or expression; for any nonzero number x, its reciprocal is 1/x.

Number

A mathematical object used to count, measure, and label.