System Analysis and Design
System prototyping helps the designer in

making the programmers understand how the system will function.
all of the listed here
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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System Analysis and Design
The black-box concept:

assumes that inputs and outputs will remain stable
None of these
is invoked by describing a system in terms of inputs and outputs, leaving the transformation process a black box.
assumes that the black box is independent
All of these

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System Analysis and Design
The advantage of Purchase Option is (are)

None of these
the flexibility of modifying the system at will
No financing is requird. The risk of system obsolescence is shifted to the lessor
All of these
Insurances, maintenance, and other expenses are included in the rental charge

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System Analysis and Design
The Turnaround is

the key information of programming
a program statement that violates one or more rules of the language in which it is written
None of these
a group of related fields
the elapsed time between the receipt of the input and the availability of the output

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