In Mule 4, what is a Batch Job used for?

• A. A batch job is a module for configuring TLS and certificates.
• B. In Mule 4, a Batch Job defines a sequence of steps that load data, process in chunks, and execute an On Complete phase.
• C. A batch job automatically generates API documentation from OpenAPI specs.
• D. A batch job is used to define Java code execution.

Answer: (B)

Batch processing in Mule 4 handles large datasets by loading data, processing it in chunks, and then running a finalization step after all data has been processed. A Batch Job defines a sequence of steps that loads data, processes in chunks, and executes an On Complete phase. This structure keeps memory usage predictable and allows transactional control, which is ideal for bulk operations like migrations or bulk updates. Each step operates on a set of items (a chunk), and the On Complete phase lets you perform cleanup, logging, or summary tasks once everything is finished. It’s not about configuring TLS, generating API documentation, or running arbitrary Java code, which are unrelated concerns.