System Analysis and Design
A square symbols

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

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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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System Analysis and Design
Which of the following is not true of the conversion phase of the development life cycle?

the user and systems personnel must work closely together
the non machine components of the system should be considered
steps must be taken to phase out the old system
documentation should be emphasized

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