Scalability:?

Short answer: Microservice Decomposition: Break down services into smaller, independent units to scale only the most resource-intensive parts of your application.

Explain a bit more

Statelessness: Keep services stateless where possible, enabling easier horizontal scaling by replicating instances without worrying about session states. Use Kubernetes: Kubernetes allows efficient resource allocation and scaling based on actual load via Horizontal Pod Autoscaling (HPA).

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.