Rollback Strategy:?

Short answer: Use Canary Deployments or Blue/Green Deployments to safely roll out changes.

Explain a bit more

These methods allow you to deploy new versions gradually and roll back easily if issues arise. If a rollback is required, it can be as simple as redeploying the previous stable version using container images or deployment configurations stored in a versioned system. Example: If the Order Service is updated to a new version and a bug is detected, you can use Kubernetes or Docker to quickly roll back to the previous stable version of the container.

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.