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Detect memory leaks in C++

PayPalSoftware Engineer · Technical Screen
MediumSoftware EngineerTechnical ScreenSoftware Engineering Fundamentals

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This interview question evaluates engineering fundamentals, trade-offs, examples, pitfalls, and operational implications in a realistic interview setting. A strong answer for Detect memory leaks in C++ states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

How do you detect memory leaks in C++? Discuss dynamic analysis tools and options (e.g., Valgrind/Memcheck, AddressSanitizer and LeakSanitizer, Visual Studio diagnostics, Xcode Instruments), runtime/reporting integration, and preventive techniques (RAII, smart pointers, ownership rules).