Two-Phase Commit (2PC):?

Short answer: Although not common in microservices due to scalability concerns, it can be used in specific cases where strong consistency is required.

Example code

In an Order Service, the Payment Service might reserve funds as part of a saga. If the next service in the saga fails (e.g., Inventory Service), a compensating action (e.g., rollback of the payment) will be triggered.

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.