System Analysis and Design
The black-box concept:

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

All of these
the root is drawn on the left and is the starting point on the decision sequence.
None of these
nodes represent the conditions, with the right side of tree listing the actions to be taken
the branch depends on the condition and decisions to made

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