System Analysis and Design
The black box concept is based on the assumption(s) that;

the relationship between the inputs and output is stable
All of these
None of these
the suprasystem is stable
black boxes are dependent or environments

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System Analysis and Design
Reverse video is a technique of

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

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System Analysis and Design
Unit testing is

running the system with line data by the actual user
testing changes made in an existing or a new program
None of these
making sure that the new programs do in fact process certain transactions according to Specifications
is checking the logic of one or more programs in the candidate system

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