Context

Embedded software often runs close to hardware, with limited memory, strict timing, and little tolerance for failure. In this environment, clean and safe C or C++ code is not just stylistic preference; it directly affects reliability, debuggability, and device safety.

Core Question

Explain how you would write clean, safe C or C++ code for embedded systems.

Your answer should address:

1. How to manage memory, state, and resource ownership safely.
2. How to interact with hardware registers, interrupts, and shared data without introducing undefined behavior or race conditions.
3. What coding standards, language features, and testing practices you would use to reduce defects.

Scope Guidance

The interviewer expects practical engineering judgment rather than language trivia. Cover core principles, common failure modes, and concrete techniques you would apply in production embedded code, including when you would prefer restricted subsets of C/C++ over more flexible but riskier patterns.