System Analysis and Design
A hierarchical chart that divides a large program into modules, in which greater details is designed in successively lower programming levels, is called a

All of these
None of these
Scheme
Structure
sub-schema

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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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