What is Black Box Testing?

Black-box testing is a method of software testing where the tester evaluates an application's functionality without any knowledge of its internal code or implementation. The focus is entirely on inputs and expected outputs — or how the software behaves externally. By treating the software as a “black box,” this approach helps ensure that features work as intended from a user’s perspective, regardless of how they are built underneath. Learn what black-box testing is, why it matters, how it’s done, and how it differs from approaches that test internal code logic.

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