Difference between white box testing and black box testing.

 Solution:-

White box testing	Black box testing
1. In white box testing documentation, logic and coding are tested.	1. In black box testing functionality of system is check.
2. White box testing is done before black box testing.	2. Black box testing is done after the white box testing.
3. In white box testing programming knowledge is required.	3. In black box testing programming knowledge does not required.
4. White box testing refers verification.	4. Black box testing refers validation.
5. White box testing is done by developer.	5. Black box testing is done by tester.
6. Cost low in white box testing.	6. Cost high in black box testing.