System Analysis and Design
An audit trial is

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

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System Analysis and Design
A Decision table

shows the decision paths
gets an accurate picture of the system
documents rules, that select one or more actions, based on one or more conditions, from a set of possible conditions.
represents the information flow

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