System Analysis and Design
The black-box concept:

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

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System Analysis and Design
A pseudocode is

None of these
an easy way to communicate the logic of a program, in English¬like statements
a protocol used in data communication
a machine code
a computer generated random number

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