Microsoft uses this to make sure that the version of Windows you are using is genuine, before they offer you free software. You can check if the version of Windows you are using is genuine by right clicking 'My Computer' or 'Computer' on the start menu.
In software test we deals with validation and verification. Both the terms look similar but have different meanings . Validation means to check whether we building a right system.
Digit Check
Validation rules limit what can go into a field. You might want to only allow values that are over 500 in a field, so the validation would be: >500 You might want dates that are before the 1st of January 2010, so that would be like this: <#01/01/2010#
JavaScript can do the validation checks easily. All you have to do is provide the values you want to validate.
Field validation ensures that a program or form is using clean incorrect data. A set of validation rules are used to check data that is entered into a system before it is processed.
Could it be check Digits?
After doing some research it seems that the average salary of a validation engineer job is about 87,000. You can check it out more here. http://www.indeed.com/salary/Validation-Engineer.html
There are many online resources that can provide you with important information about validation jobs. The best place to check would be the website Indeed.
types of validations are: required field validation range validation pattern matching validation database specific validation numeric validation
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Verification is intended to check that a product, service, or system meets a set of initial design requirements, specifications. Validation is intended to check that development and verification procedures for a product, service, or system result in a product, service, or system that meets initial requirements, specifications. The biggest problem arises when something is verified but the fails validation.
Validation is the term used in the Software Engineering in the development cycle of a software. Validation refers for answering the question "are we building product right?". i.e) to check whether we are building the product in the exact way which we have designed with the requirements and checking whether all the requirements and constraints for the product are satisfied.
If a validation study is conducted before placing a product in the market, then it is called prospective validation. If a product is placed on the market during the validation study, it is called as concurrent validation.