System Analysis and Design
The four icons used in building Data Flow Diagram are

Flow, Source, Store, Process
Flow, Process, Source, Store
None of these
Flow, Process, Source/Destination, Store
Source, Process, Destination, Store

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System Analysis and Design
The outstanding Invoice file should be stared on a Pardon Access Storage Device if

payment recording is done in a batch rode
inquires concerning payable are to be answered on-line
invoice data entry is on-line.
None of these
last record points to the first record

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