Validation and verification

Any form of interaction with a computer needs to be checked to ensure that what is coming in is what was expected. This could be sign up information on web forms to bar codes. Errorneous infromation can lead to many issues and many bugs in software can be traced back to unexpecting input.

There are two ways to check information coming into a computer

When data is being put into a computer ssytem we can perform validation checks. These include


When data has been entered we can do verification checks such as -