Tricky Question — “Why not use synchronous?

PI 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.