What is the purpose of black-box and white-box testing techniques? give an original detail example of each type.

Black-Box testing Technique is a Technique  where tester test the system by providing some input and verifies that against the desired out put with out any knowledge on internal structure of the testing system

White-Box testing Technique is a Technique  where tester test the system by providing some input and verifies that against the desired out put with the knowledge on internal structure of the testing system

Explanation:

Black-Box testing Technique is a Technique  where tester test the system by providing some input and verifies that against the desired out put with out any knowledge on internal structure of the testing system

White-Box testing Technique is a Technique  where tester test the system by providing some input and verifies that against the desired out put with the knowledge on internal structure of the testing system

Back-box testing generally meant for QA to test the overall functionality of the system

White-box testing generally meant for Developers to check their code quality .Unit testing comes under this category where the test user should have some knowledge on programming which is used to develop the system

b. xor is the correct answer