Difference between synchronous and asynchronous RFC calls in SAP

Synchronous RFC calls block the calling program until the remote function module is finished executing, while asynchronous RFC calls do not block the calling program and allow it to continue executing without waiting for a response from the remote system.

Understanding the distinction between synchronous and asynchronous RFC calls is crucial for designing efficient and responsive SAP systems. Synchronous calls are suited for scenarios where immediate feedback from the remote system is required, while asynchronous calls are ideal for scenarios where the calling program can proceed without being dependent on the remote system's response.