What is DNS-based service discovery, and how does it work in microservices?

Short answer: DNS-based Service Discovery is a method where DNS (Domain Name System) is used to resolve the network location (IP address) of a service instance in a microservices architecture. How it works:

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.