When using Scatter-Gather, what is the key outcome after branches complete?

• A. Branches run serially and results are merged afterward.
• B. The results from parallel branches are aggregated.
• C. No aggregation happens; each branch is independent.
• D. Only the last branch result is kept.

Answer: (B)

Scatter-Gather runs multiple branches in parallel and then combines their results into one final message. The essential outcome is that the responses from all the parallel branches are aggregated into a single payload that continues through the flow. This aggregation often results in a collection or composite object containing each branch’s result, ready for downstream processing. In other words, the pattern’s power lies in parallel execution plus merging those results into one coherent message. The other ideas—serial execution, keeping branches independent, or discarding everything except the last result—don’t reflect how Scatter-Gather is designed to work.