White-box testing (also known as clear box testing, glass box testing, transparent box testing, and structural testing) tests internal structures or workings of a program, as opposed to the functionality exposed to the end-user.
Black-box testing treats the software as a "black box", examining functionality without any knowledge of internal implementation. The tester is only aware of what the software is supposed to do, not how it does it
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Roanne Eteiwi , Quality Assurance Engineer , Bayt.com
Black box testing is performed with the software under test treated as a black box. You can't "see" into it. The test provides inputs and responds to outputs without considering how the software works. The internal structure/design of the software is not known to the tester.
White box testing is used to test areas that cannot be reached from a black box level. There is awareness of the internal structure of the software and it tests the internal structure as well. The internal structure/design of the software is known to the tester.
Black box testing is carried out without the knowledge of the internal structure, it ignores the internal mechanism of a system.
White box testing is the testing that takes into account the internal mechanism of a system or component .
