System Analysis and Design
A couple:

is represented by a line joining two modules
None of these
None of these
is a data item that moves from one module to another
means that the upper module has the capability of calling the lower module

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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
post-auditing the system after its implementation
test data used by the system auditor

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