System Analysis and Design
The black-box concept:

assumes that inputs and outputs will remain stable
assumes that the black box is independent
None of these
All 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
Inverted list organization

None of these
Stores records sequentially but uses an index to locate records
uses an index for each key type
has records placed randomly throughout the file
means storing records in contiguous blocks according to a key.

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