Content Negotiation: Specify the version based on the Accept header (MIME?

Short answer: type). Example: GET /api/orders with a header Accept: application/vnd.orders.v1+json Best Practice: It’s important to maintain backward compatibility in old versions and deprecate versions in a controlled manner.

Real-world example (ShopNest)

ShopNest splits Catalog, Cart, Order, and Payment into services so teams can deploy catalog changes without redeploying payments.

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.