What is an event-driven architecture, and how is it used in microservices?

Short answer: An event-driven architecture (EDA) is a design paradigm in which services communicate by producing, consuming, and reacting to events.

Explain a bit more

In an event-driven architecture, an event represents a state change or a significant occurrence within the system.

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.