Zero Downtime Migration: ○ Use database migration strategies (e.g., backward-compatible schema changes, data migration in parallel) to ensure that the system remains

Short answer: vailable during deployments. Example: In a Kubernetes environment, you can perform a rolling update by gradually updating pod replicas to ensure availability.

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.