What is the purpose of the input phase in a batch job?

• A. Triggers processing via an inbound endpoint and may modify the payload before processing
• B. Dispatches the batch to worker nodes
• C. Processes elements
• D. Completes and cleans up

Answer: (A)

In a batch job, the input phase is where data enters and is prepared for processing. It gathers items from the source, often via an inbound endpoint, and queues or organizes them so the rest of the batch can work on them. It can also modify the payload here to shape it into the form expected by the processing steps. This is why describing the input phase as triggering processing via an inbound endpoint and potentially altering the payload before processing best captures its purpose. The other phases handle distributing the prepared items to workers, actually processing each element, and finalizing cleanup, but they aren’t about bringing data in.