Detecting INACCURATE, INCOMPLETE or UNREASONABLE data. Performed by computer SOFTWARE.
Types of Validation
RANGE CHECK: makes sure the data is WITHIN A CERTAIN RANGE.
e.g. Applicants must be 18 or over.
PRESENCE CHECK: ensures that data that MUST be entered in to the system IS entered.
e.g. Mandatory fields: cannot register for email account without password, password field needs a presence check.
CHECK DIGIT: used for entering large numbers into a computer system, e.g. CREDIT CARDS.
- An ADDITIONAL NUMBER is added to the end of the original…