This is a validation check that ensures no letters have been entered into a field marked "quantity" or no numbers have been entered into a field marked "name"
Length Check
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Most field will have a maximum length and some have a minimum. Telephone numbers for example would be subject to both
Range Check
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This would apply to numerical fields, allowing them maximum and minimum values. Fields containing prices or quantities might have this type of check.
Lookup
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This ensures data is valid, the user might select a value from a list rather than typing.
Presence Check
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simply checks that something (anything) has been input
Type Check
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This check the appropriate data type (number, date, etc.) was adhered to.
Verification
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Double entry
This is where the same data is entered twice, often by two different operators.If the two entries don't match, they must be re-entered twice
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Check digits
This is used when you want to be sure that a range of numbers has been entered correctly. For example a bar code of an ISBN number.
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This technique will then check the final number in the sequence before the computer performs a complex calculation on all of the numbers to compare the answer to the final number. If both match, it meas data has been entered correctly.
Screen validation
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After data has been entered, the user is presented with a screen showing the entered data, offering a chance to visually check and correct any errors.
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Other cards in this set
Card 2
Front
This is a validation check that ensures no letters have been entered into a field marked "quantity" or no numbers have been entered into a field marked "name"
Back
Length Check
Card 3
Front
Most field will have a maximum length and some have a minimum. Telephone numbers for example would be subject to both
Back
Card 4
Front
This would apply to numerical fields, allowing them maximum and minimum values. Fields containing prices or quantities might have this type of check.
Back
Card 5
Front
This ensures data is valid, the user might select a value from a list rather than typing.
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