Service Mesh: Use a service mesh like Istio or Linkerd, which can manage?

Short answer: service-to-service communication across multiple regions, providing consistent service discovery, load balancing, and security policies.

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.