Consistency: Achieving consistency in a distributed system is more difficult because?

Short answer: different microservices may hold copies of the same data, which may take time to synchronize. Techniques like Event Sourcing and CQRS help, but they often come at the cost of performance.

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.