A physical data flow diagram (DFD) uses bubbles to specify where, how, and by whom a system's processes are accomplished.

Name: A physical data flow diagram (DFD) uses bubbles to specify where, how, and by whom a system's processes are accomplished.
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Quizplus · Accepted Answer

A physical data flow diagram (DFD) indeed uses bubbles to depict the processes of a system including where, how and by whom they are executed. These bubbles on a physical DFD signify real processes, files, or systems in the implemented system.

A Physical Data Flow Diagram (DFD) Uses Bubbles to Specify