System Analysis and Design
Advantages of Relational Database Management systems are

Flexibility, of relating different logical files
Data independence since it allows the database to grow by adding new attributes and relations.
Security controls can be more easily implemented.
None of these
All of these

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System Analysis and Design
System prototyping helps the designer in

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

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System Analysis and Design
Cost-Benefit analysis

All of these
None of these
estimates the hardware and software costs
compares the cost, with the benefits, of introducing a computer-based system
evaluates the tangible and non-tangible factors

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