1Data Validation VerificationMedium5 marks
Validation and verification can be used to protect the integrity of data.
Complete the description of methods of ensuring data integrity by selecting the missing terms.
is a method of verification where the data is entered by a user and then manually compared to the original data to make sure that they are the same.
A verification method used during data transfer calculates a value from the data which is transferred with the data. The receiver performs the same calculation and compares the result with the value transferred. This method of verification is .
check compares the data entered to a list of possible values that can be entered. If the data is not one of these values it is rejected.
check can be used to make sure data entered has the correct combination of letters, numbers and symbols. For example, a code may need to be two capital letters, one number followed by one symbol.
check is used to make sure the correct quantity of characters has been entered. For example, a name must be more than one character and less than or equal to 100 characters.