what is white box and black box testing

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White box testing is testing the internal structure of the system while black box testing is testing the external behavior of the system.

White box testing is also known as clear box testing or structural testing.
It involves testing the code, architecture, and design of the system.
Examples include unit testing, integration testing, and code coverage analysis.
Black box testing is also known as functional testing or behavioral testing.
It involves testing the system's functionality without knowledge of its internal structure.
Examples include system testing, acceptance testing, and regression testing.

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