Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 12 - No. 32)
In data validation, what role does a check digit primarily serve?
To check that the data type is correct.
To detect errors introduced during data entry.
To ensure data entry in the right format.
To determine the presence of required data.
Paskaidrojums
Check digits are used to detect errors during data entry.