Validation and Verfication

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Validation is an automatic computer check to make sure data is sensible.

Types of Validation:

Validation typeHow it worksExample usage Check digit The last one or two digits in a code are used to check the other digits are correct Bar code readers in supermarkets use check digits Format check Checks the data is in the right format A National Insurance number is in the form LL 99 99 99 L where L is any letter and 9 is any number Length check Checks the data isn't too short or…


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