System Analysis and Design
A system analyst designs a new system by

adopting a developed system to the present environment
propose alternatives to the current system
developing the system as a large, single unit
None of these
identifying sub systems and the interfaces between sub systems

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System Analysis and Design
The black-box concept:

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

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System Analysis and Design
Positive testing is

making sure that the new programs do in fact process certain transactions according to Specifications
is checking the logic of one or more programs in the candidate system
running the system with line data by the actual user
testing changes made in an existing or a new program

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