An extra digit added to a code number verified by applying mathematical calculations to the individual code number characters is a
A) control digit.
B) hash digit.
C) check digit.
D) verification digit.

Question

Quizplus · Accepted Answer

A check digit is a digit added to a code number for error detection purposes. It is derived by performing mathematical calculations on the other digits in the code. The purpose is to check for errors, such as transpositions or incorrect digits, that may have occurred during data entry or transmission.

An Extra Digit Added to a Code Number Verified by Applying