System Analysis and Design
The approach used in top-down analysis and and design is

All of these
to prepare flowcharts after programming has been completed
to identify a top level function and then create a hierarchy of lower level modules and components
None of these
to identify the top level functions by combining many smaller components into a single entity.

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

all of the listed here
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.

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