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Explain the main types of validation checks that may be used on data

Explain the main types of validation checks that may be used on data

Answers

Steve
Presence - Data are checked to ensure that all fields are present.
Size - Fields are checked to ensure that they contain the right number of characters.
Range - Number of codes are checked to ensure that they are within the permissible range.
Character check - Fields are checked to ensure that they contain only characters of the correct type e.g. no letters in numeric field.
Format - Fields are checked to ensure that they are of the correct format.
Reasonableness - Quantities are checked to ensure that they are not abnormally high or low.
Check digits – Use of a check digit enables a number to be self-checking. It’s a means of ensuring that a number (e.g. a customer account number) maintains its validity.

Steve ju answered the question on June 7, 2018 at 18:19

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