System Analysis and Design
Unit testing is

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
None of these
is checking the logic of one or more programs in the candidate system

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System Analysis and Design
Sequential organization

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

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System Analysis and Design
In Decision trees

None of these
the branch depends on the condition and decisions to made
the root is drawn on the left and is the starting point on the decision sequence.
All of these
nodes represent the conditions, with the right side of tree listing the actions to be taken

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