System Analysis and Design
Unit testing is

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

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System Analysis and Design
Inverted list organization

uses an index for each key type
None of these
Stores records sequentially but uses an index to locate records
has records placed randomly throughout the file
means storing records in contiguous blocks according to a key.

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System Analysis and Design
In a Decision tree

the branch, to be followed, depends on the conditions and decisions, to be made
the root is drawn on the left and is the starting point on the decision sequence
all of the listed here
the nodes represent the conditions, with the right wise of tree listing the actions to be taken

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