System Analysis and Design
An audit trial is

designed to permit tracing of any input record or process performed on a system, back toits original sources
All of these
None of these
test data used by the system auditor
post-auditing the system after its implementation

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System Analysis and Design
Unit testing is

None of these
running the system with line data by the actual user
testing changes made in an existing or a new program
is checking the logic of one or more programs in the candidate system
making sure that the new programs do in fact process certain transactions according to Specifications

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