System Analysis and Design
Data Definition Language (DDL)

determine how data must be structured to produce the user's view
specifies for the DBMS what is required; the techniques used to process data
describes how data are structured in the data base
all of the listed here

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System Analysis and Design
An audit trial is

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

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System Analysis and Design
Cost-Benefit analysis

compares the cost, with the benefits, of introducing a computer-based system
None of these
evaluates the tangible and non-tangible factors
All of these
estimates the hardware and software costs

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