System Analysis and Design
The term Parallel Run refers to

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

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System Analysis and Design
The approach used in top-down analysis and design is

to prepare flow charts after programming has been completed
to identify the top level functions by combining many smaller components into a single entity
to identify a top level function an d then create a hierarchy of lower-level modules and components.
all of the listed here

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