Event Broker: Tools like Kafka, RabbitMQ, or AWS SNS are used as message?

Short answer: brokers to distribute events between services. Example: In an e-commerce system, when a payment is successful, an event could be emitted to notify the shipping service to begin processing the order. Real-World Microservices Challenges

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.