Commit Phase:?

Short answer: If all participants vote to commit, the coordinator sends a commit message to all participants, and the transaction is finalized. If any participant votes to abort, the coordinator sends an abort message to all participants, rolling back the transaction. Downsides: Two-phase commit can cause performance bottlenecks and is prone to blocking if the coordinator or any participant fails during the process.

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.