algorithms (7)

Cards (8)

  • validation
    process carried out by a computer of checking that data input is reasonable
  • examples of validation
    • range check
    • type check
    • length check
    • presence check
    • check digit
  • verification
    checking that data has been accurately copied from one source to another, for example from one computer system to another
  • examples of verification
    • double entry
    • visual / screen check
  • normal data
    data that falls within an allowed range and data type
  • boundary data
    data that exists at the upper and lower limits of this normal accepted range, and the data just outside that range
  • extreme data
    type of data that exists at the upper and lower acceptable limits of the prerequisite conditions of the type and range of data
  • abnormal data
    any type of data which should be rejected by the system under the test criteria. the most common reasons for rejection are:
    • the data outside the range of values
    • the data is not the expected data type
    any data that is not classified as normal data