Ingress Controllers:?

Short answer: Ingress controllers provide HTTP and HTTPS load balancing, routing external traffic to the appropriate services within the Kubernetes cluster. Popular ingress controllers like NGINX, Traefik, and HAProxy handle routing and load balancing across multiple service instances.

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.