System Analysis and Design
An open rectangle

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

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System Analysis and Design
An audit trial is

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

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