validation and verification

Checks that input data does not contain incorrect characters

• Range Check

• Type Check

• Length Check

Methods of validation:

• Type Check

• Range Check

• Visual Check

• Length Check

• Check Digit

Validation checks the accuracy of the data entered

• False

• True

Checks whether input data contains the required number of characters

• Range Check

• Type Check

• Length Check

Methods of verification:

• Double Entry

• Range Check

• Visual Check

• Length Check

An extra digit added to a number which is calculated from the other digits

• Range Check

• Type Check

• Length Check

• Check Digit

A way of preventing errors when data is copied from one medium to another

• Verification

• Validation

Automatic computer check to ensure that data entered is sensible and reasonable

• Verification

• Validation

Check whether data is within a given acceptable spectrum of values

• Range Check

• Type Check

• Length Check

Data is entered twice and the computer checks they match up

• Double Entry

• Visual Check

• Presence Check