What is the difference between trigger and binding?

Short answer: Trigger: Invokes the function. Every function must have one trigger. Binding: Connects function inputs/outputs to external resources. Optional, can have multiple.

Real-world example (ShopNest)

ShopNest on Azure typically uses App Service + SQL Database + Blob Storage + Application Insights for monitoring.

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.