Immutable Data: Once an event is stored, it cannot be modified, ensuring data?

Short answer: integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency.

Example code

integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency. integrity and consistency.

Real-world example (ShopNest)

After payment succeeds, ShopNest publishes OrderPaid. Inventory and Notification services react independently—no giant distributed transaction.

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.