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Mutation testing measures the effectiveness of
AA test suite by mutating production code
BPerformance under heavy concurrent load
CSecurity of an API authentication system
DUsability of the user interface design
Answer & Solution
Correct answer: A. A test suite by mutating production code
Mutation testing introduces small changes (mutations) into production code. If existing tests do not fail on a mutant, the mutant 'survives' and indicates weak test coverage. Tools: PIT (Java), Stryker (JS), Mutmut (Python).
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