System Analysis and Design
The black-box concept:

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

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System Analysis and Design
A system design is said to be functionally modular if

the system is developed using structured programming through COBOL or PASCAL
the system makes extensive use of function. keys for maximum user assistance
None of these
the system is able to handle all the function of the application
each module performs a specific function and can be developed relatively independently by programmers

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