System Analysis and Design
Conversion method in which users, being used to an old system, continue to use the old system, along with the new system, is

Multiprocessing
None of these
Parallel run
Multitasking
All of these

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System Analysis and Design
Rapid prototyping proves the quality of a design by

having a program simulate the real system
having the system analyst present an overview of the design to users, programmers, and consultants
both (a) and (b)
having a data flow diagram
None of these

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