Readiness Probe:?

Short answer: Indicates whether the service is ready to handle traffic. If the probe fails, Kubernetes will stop sending traffic to the service.

Example code

A HTTP endpoint (e.g., /health/ready) can be used to check if the service has completed its initialization. Example: In Kubernetes, configure a livenessProbe and readinessProbe for a User Service that checks the database connection and ensures the service is ready before accepting traffic.

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.