System Analysis and Design
The black-box concept:

assumes that the black box is independent
None of these
All of these
assumes that inputs and outputs will remain stable
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
Acceptance testing is

is checking the logic of one or more programs in the candidate systems
running the system with line data by the actual user
testing changes made in an existing or a new program
making sure that the new programs do in fact process certain transactions according to Specifications

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