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
All of these
assumes that the black box is independent
assumes that inputs and outputs will remain stable

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System Analysis and Design
Reverse video is a technique of

showing data upside down on the screen
emphasizing data by reversing the foreground and background
showing data with half brightness
hiding confidential data on the screen
None of these

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