System Analysis and Design
The systems conversion technique of totally removing the existing system and immediately implementing the new system is called a

phased conversion
parallel run
pilot conversion
None of these
crash conversion

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System Analysis and Design
System prototyping helps the designer in

all of the listed here
making the programmers understand how the system will function.
giving a demo of the software, to the system manager to whom he reports
communicating to the user, quickly, how the system, when developed, will look like and get a feedback.

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