System Analysis and Design
Tracing, of any input record or process, performed on a system, back to its original source, is an

audit trial
batch processing
report generation
None of these
conversion

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System Analysis and Design
System prototyping helps the designer in

making the programmers understand how the system will function.
all of the listed here
giving a demo of the software, to the system manager to whom he reports
communicating to the user, quickly, how the system, when developed, will look like and get a feedback.

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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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