This question was asked in one of my interviews. In the process model shown, there are three parallel approval tasks assigned to three different users . The requirement is: if any one user approves, the remaining two tasks should automatically be cancelled and the process should move forward.

To achieve this, I configured a end node as Terminate End Event which all three paths are connected. As soon as any one of the tasks is completed by user, the flow reaches the terminate node, which immediately cancels all other active tasks and ends the process model. This deactivates the other pending active tasks and change process model from active to completed.