System Analysis and Design
Positive testing is

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

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System Analysis and Design
The approach used in top-down analysis and and design is

All of these
to identify a top level function and then create a hierarchy of lower level modules and components
to prepare flowcharts after programming has been completed
None of these
to identify the top level functions by combining many smaller components into a single entity.

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