why do u go for whitebox testing,when black box testing is
available?

Answer Posted / aravind

While doing a black box testing we will know the
requirement and we directly test the functionality. Here
there is a possibility of leaving certain input condition
(practically speaking exhaustive testing of the system is
not at all possible) which may lead to erroneous result.
This situation described above can be completely avoided by
doing an whitebox testing where we will have the access to
code and bring up a test scenario where the system will
fail and expose the hidden defect.

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