Flashcards
Validation & Verification
Cards in this deck (11)
- 1ValidationValidation checks are automatic checks made by a computer to ensure that any data entered into the computer is valid and sensible
- 2Presence CheckChecks that data has been entered into a field and that it has not been left blank; for example, ensures that a last name is always entered into each record in a database of addresses.
- 3Data Type CheckChecks that a value entered is of a particular data type; for example: ensures that a product price is in currency data type.
- 4Length CheckChecks than an entered value such as mobile phone is no longer than a particular number of characters, 11 in this case.
- 5Check DigitsThese are normally digits on a ISBN Book code that are used as part of a calculation to ensure that the code entered is a valid code.
- 6Range CheckChecks that an entered value falls within a particular range. For example, the price of a product could be in the range £0.50 to £185 for a toy shop.
- 7Format CheckChecks that an entered value has a particular format; for example a post code typically consists of a set format.
- 8VerificationThe method used to check that the data entered into a computer is the same as it was on the original source of the data; in other words checking that the data is correct.
- 9Two ways of verifying dataVisual checks and Double entry
- 10Visual checksProof reading data to check that it exactly matches the source data
- 11Double EntryThis is where data is entered twice from the source data and compared