JWT Validation: ○ The API Gateway can decode and validate JWT tokens to authenticate users?

Short answer: And extract user roles for authorization. Example: Verify the signature of the JWT and check its expiry before forwarding the request to the microservices.

Real-world example (ShopNest)

ShopNest’s API Gateway routes /orders to the Order service and /payments to Payment—clients talk to one entry point.

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.