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
is checking the logic of one or more programs in the candidate system
None of these
running the system with line data by the actual user

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System Analysis and Design
The rule(s) to follow in constructing decision tables is (are):

the logic of the table is independent of the sequence in which conditions rules are written, but the action takes place in the order is which the events occur.
a decision should be given a name
standardized language must be used consistently.
all of the listed here

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