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

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System Analysis and Design
Direct-access organization

uses an index for each key type
has records placed randomly throughout the file
means storing records in contiguous blocks according to a key.
Stores records sequentially but uses an index to locate records

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