Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 1 - No. 26)
In which of the following scenarios, would a check digit be MOST useful?
Validating an email address
Validating the length of a password
Verifying a bank account number
Checking the age of a user
Explication
Check digits are used to detect errors when data entry is manual and the data is not automatically verified.