How do you trace function failures in Azure Functions?

Short answer: Enable Application Insights in Function App. Monitor exceptions, failed invocations, and retries. Example: Check telemetry via FunctionInvocationException.

Real-world example (ShopNest)

Order-paid events go to Service Bus; an Azure Function sends the confirmation email asynchronously.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.