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.
None of these
assumes that inputs and outputs will remain stable
assumes that the black box is independent
All of these

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System Analysis and Design
A structure chart is

a document of what has to be accomplished
None of these
a statement of information processing requirements
All of these
a hierarchical partitioning of the program

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