System Analysis and Design
Indexed-Sequential organization

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

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System Analysis and Design
Unit testing is

None of these
is checking the logic of one or more programs in the candidate system
testing changes made in an existing or a new program
running the system with line data by the actual user
making sure that the new programs do in fact process certain transactions according to Specifications

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