Validation and Verification Flashcards
How can a data error occur?
It may not be read properly from a data capture sheet
Typing errors occur
Name two examples of verification
Proofreading
Double Entry
What is presence validation?
It checks that data has been entered
What is existence validation?
It checks that the entry matches stored data
What is control total data checking?
A calculation that adds up a total of a set of the numbers and checks that the total is meaningful
What is hash total data checking?
A calculation that adds up a set of numbers but the total has no meaning
What is the difference between validation and verification?
Validation is by a computer but verification is by a person e.g. proof-reading
What is range validation?
Checks that the data is within a set range
What is length validation?
Checks that the correct number of characters has been entered
What is check digit validation?
Checks that the data is allowed or can exist
