System Analysis and Design
System prototyping helps the designer in

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

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System Analysis and Design
Top-down programming is

a map of the programmer's view of the data
a group of related fields
an approach in which the top module is first tested then program modules are added from the highest level to the lowest level
a series or group of components that perform one or more operations of a more complex system

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System Analysis and Design
Most algorithms follow the format of

Entering the input items, then displaying the input items, and then processing the output items
Entering the output items, then displaying the output items, and then processing the output items
Entering the output items, then processing the output items, and then displaying the output items
Entering the input items, then processing the input items, and then displaying the output items
Entering the input items, then processing the output items, and then displaying the output items

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