How do you add fault tolerance to code at the end of a process?

Adding fault tolerance at the end of a process typically involves implementing retry logic, circuit breakers, and graceful degradation. First, wrap the final operation in a try‑catch block and, on failure, attempt a limited number of retries with exponential back‑off. If retries fail, trigger a circuit breaker that temporarily halts the operation to prevent cascading failures. Finally, provide a fallback path (e.g., return a cached value or a default response) so the system remains usable. Logging each failure and retry attempt aids in monitoring and debugging. This approach ensures the system can recover from transient errors without crashing.