System Analysis and Design
Unit testing is

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
is checking the logic of one or more programs in the candidate system
None of these
running the system with line data by the actual user

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

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

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