Which approach can be used to ensure that multiple parallel routes complete before continuing, while handling their individual outcomes?

• A. Use a Choice Router
• B. Use a Scatter-Gather
• C. Use a VM transport
• D. Use a For Each

Answer: (B)

The concept here is coordinating parallel processing with synchronization. Scatter-Gather lets you send the same message to multiple routes that run in parallel, and then it waits for all of those branches to finish before continuing. Because each branch completes independently, you can handle and inspect each route’s outcome as it comes back, and then use an Aggregator to combine the results into a single response to move forward. This pattern is exactly what you need when you want parallel work to finish before proceeding, while still managing each branch’s result.

Why the other options don’t fit: a Choice Router directs the message down only one path, so nothing runs in parallel to wait for. A VM transport is about moving messages within the same runtime across isolated contexts, not about coordinating multiple parallel routes. A For Each processes items in a collection sequentially or in a controlled loop, which doesn’t achieve parallel completion with aggregation of distinct branch outcomes.