Validation

Question 1

Name some validation methods

Answer 1

• presence check
• format check
• range check
• data type check
• length check
• fixed value
• check digit

Question 2

What is a presence check

Answer 2

It is when data Is required and must be entered -when submitting a website order you must enter your email address

Question 3

Define range check and give an example

Answer 3

It is when data must be between stated ranges eg the numbers of a month should be between 1 and 12

Question 4

Define length check and give an example

Answer 4

It is when data must have a certain number of characters or numbers eg when you have a credit card it must have 16 numbers as the card number

Question 5

Define format check and give and example

Answer 5

It is when data must be in the correct format eg a postcode must be in the format Lk2 4DB

Question 6

Define validation

Answer 6

Validation is a computer check to ensure that data is sensible but not nesseserily correct