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      Question

      In software testing, what is 'black box

      testing'?
      A Testing performed by the development team with full code knowledge Correct Answer Incorrect Answer
      B Testing focused on internal code structure and logic Correct Answer Incorrect Answer
      C Testing of network security penetration Correct Answer Incorrect Answer
      D Testing performed in a dark environment to simulate power failures Correct Answer Incorrect Answer
      E Testing where the tester has no knowledge of internal code and tests only inputs/outputs Correct Answer Incorrect Answer

      Solution

      Black box testing treats the software as a black box — testers only know inputs and expected outputs, not the internal logic. It tests functional requirements from the user's perspective. White box testing uses full code knowledge. Grey box testing is a hybrid. Black box testing is common in banking UAT (User Acceptance Testing).

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