Where must data objects be defined in BPMN?

• A. Inside the start and end events.
• B. Inside the data stores only.
• C. Inside the tasks.
• D. In the participant pools.

Answer: (A)

Data objects in BPMN represent data required by or produced by the process, and they’re shown as artifacts that relate to the process boundary. Placing data objects inside the start and end events communicates the data that must be available to begin the process and the data that results when it completes. This usage ties data directly to the process as a whole, clarifying inputs and outputs at the process boundary.

Data stores, by contrast, model persistent, long‑term storage of data and aren’t about the immediate inputs/outputs of a process instance. Tasks can reference data objects through data associations, but the data objects themselves aren’t defined inside a task. Pools deal with participants and organizational boundaries, not data definitions.

So, showing data objects at the start and end events best communicates the data entering and leaving the process.