System Analysis and Design
The term Parallel Run refers to

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

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System Analysis and Design
A couple:

is a data item that moves from one module to another
is represented by a line joining two modules
None of these
means that the upper module has the capability of calling the lower module
None of these

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System Analysis and Design
Sequential organization

Stores records sequentially but uses an index to locate records
has records placed randomly throughout the file
None of these
means storing records in contiguous blocks according to a key.
uses an index for each key type

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