[amp_mcq option1=”defines a source or destination of system data” option2=”identifies data flow” option3=”represents a process that transforms incoming data flow(s) into outgoing data flows” option4=”is a data store-data at rest, or a temporary repository of data E. None of the above” correct=”option1″]
The correct answer is: A. defines a source or destination of system data.
An open rectangle in a data flow diagram (DFD) represents a source or destination of system data. It is a symbol that represents a physical entity that either provides or receives data to or from the system. Examples of sources and destinations include people, organizations, files, and devices.
Option B is incorrect because an open rectangle represents a source or destination of system data, not a data flow. A data flow is a line that connects two symbols in a DFD and represents the movement of data between them.
Option C is incorrect because an open rectangle represents a source or destination of system data, not a process. A process is a symbol that represents a transformation of data.
Option D is incorrect because an open rectangle represents a source or destination of system data, not a data store. A data store is a symbol that represents a repository of data.
Option E is incorrect because an open rectangle is a valid symbol in a DFD.