System Analysis and Design
The reservation system of Indian railways is an example of

management controls system
expert system
Interactive decision support system
transaction processing system
None of these

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System Analysis and Design
An audit trial is

All 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
post-auditing the system after its implementation
None of these

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System Analysis and Design
A square symbols

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

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