System Analysis and Design
Positive testing is

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
running the system with line data by the actual user
testing changes made in an existing or a new program

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System Analysis and Design
The advantage of Purchase Option is (are)

the flexibility of modifying the system at will
No financing is requird. The risk of system obsolescence is shifted to the lessor
None of these
All of these
Insurances, maintenance, and other expenses are included in the rental charge

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