Error Handling and Fault Tolerance Questions

Techniques for detecting, containing, and recovering from hardware and software faults in constrained systems. Topics include input validation, timeout and retry policies, watchdog timer usage, safe and deterministic fallback or degraded modes, structured error propagation and logging, diagnosability and telemetry for failures, idempotent operation design, graceful restart strategies, and testing edge cases through fault injection. Candidates should explain how they balance complexity, resource overhead, and reliability goals.