System Analysis and Design
The black-box concept:

assumes that the black box is independent
None of these
All of these
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

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System Analysis and Design
A pseudocode is

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

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