What Is The Difference Between Verification And Validation In Testing?

What Is The Difference Between Verification And Validation In Testing?
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  1. Verification refers to testing of the product in development after the development phase.
    Validation refers to testing of the whole software at the end of development.
    Here are some differences between the two:
    1. Verification answers the question are we building the system right and validation answers the question are we building the right system.
    2. Verification is done to make sure the product meets specified specification whereas validation is done to check if the product under development meets business requirements and the documented specifications are right or not.
    3. While verification code need not be executed but while validation code needs to be executed.
    4. Verification is done before validation.
    5. Cost of fixing errors in verification phase is less compared to that in validation phase.

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