System Analysis and Design
A data flow diagram is

None of these
All of these
mainly used at the systems specification stage.
the primary output of the systems design phase
the modern version of flowchart

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System Analysis and Design
Cost-Benefit analysis

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

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