Distributed Transactions: Managing transactions across multiple services becomes?

Short answer: complex. The two-phase commit pattern is often not feasible due to performance concerns, so patterns like Saga or Compensating Transactions need to be adopted.

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.