How does autoscaling work with App Service Plans?

Short answer: Configure scale rules based on metrics: CPU %, memory, HTTP queue length. Set minimum and maximum instance counts. Azure automatically adds or removes instances to handle traffic. Azure Q&A

Real-world example (ShopNest)

ShopNest’s API runs on Azure App Service with staging slots—swap staging to production after smoke tests.

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.