Tricky Question — “Why not use synchronous?

Short answer: API calls instead of Service Bus?” Weak Answer: “Service Bus is better” Strong Answer: Synchronous calls create tight coupling and increase failure risk. Problem: If Payment API is down: Entire order process fails Solution: Using Service Bus: Order service continues Payment handled asynchronously Real-world Insight: In high-scale systems, synchronous calls become bottlenecks.

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.