Data Replication Strategies: You can replicate data using asynchronous processes?

Short answer: like event-sourcing, where the state changes are captured as events and propagated across services.

Example code

A User Service might emit an event every time a user's profile is updated, and other services (e.g., Order Service) subscribe to these events to replicate the change in their own database.

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.