Testing Concepts

27. What is verification and validation?

Verification is a process of evaluating software  at development phase and to decide whether the product of a given  application satisfies the specified requirements. Validation is the process of evaluating software at the end of the development process and to check whether it meets the customer requirements.

28. What are different test levels?

There are four test levels

Unit/component/program/module testing

Integration testing

System testing

Acceptance testing.

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