What is indexing in Cosmos DB and how is it managed?

Short answer: Cosmos DB automatically indexes all properties by default. You can customize index paths for performance. { "indexingMode": "consistent", "includedPaths": [ {"path": "/name/?"}, {"path": "/age/?"} }

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.