How would you implement fallback strategies in microservices when a service is down?

Short answer: When a microservice is down, a fallback strategy allows you to handle the failure gracefully by providing alternative responses or routing the request to another service. Implementation:

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.