System Analysis and Design
A self check digit is useful in detecting

None of these
transcription errors only
transposition errors only
Random errors only
All of these

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System Analysis and Design
In Decision trees

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

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System Analysis and Design
The black-box concept:

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

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