System Analysis and Design
Conversion method in which users, being used to an old system, continue to use the old system, alongside the new system, is

None of these
All of these
multi processing
multitasking
parallel run

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

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