Self-checking digits:
A) determine whether the input data for each field falls within the legitimate set or range of values defined for that field.
B) compare data entered against the known formatting requirements for that data.
C) determine whether a known relationship between two fields is valid.
D) ensure that the correct type of data is input.
E) determine data entry errors on primary keys.

Question

Quizplus · Accepted Answer

Self-checking digits are used to detect errors in data entry, particularly for primary keys, by adding a digit that is calculated from the other digits in the number.

Self-Checking Digits