System Analysis and Design
An audit trial is

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

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System Analysis and Design
An open rectangle

defines a source or destination of system data
None of these
identifies data flow
is a data store-data at rest, or a temporary repository of data
represents a process that transforms incoming data flow(s) into outgoing data flows

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