System Analysis and Design
A square symbols

represents a process that transforms incoming data flow(s) into outgoing data flows
None of these
identifies data flow
is a data store-data at rest, or a temporary repository of data
defines a source or destination of system data

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System Analysis and Design
The term Parallel Run refers to

the concurrent operation of an existing system and a new system
None of these
All of these
the processing of two different jobs initiated from two terminals.
the same job run on two different computer to test their speeds

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