Client-Side Discovery:?

Short answer: The client directly queries a service registry to obtain the list of available instances of a service. It then chooses a suitable instance to connect to. Tools: Netflix Eureka, Consul, Zookeeper, Etcd.

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.