System Analysis and Design
Structured design methodology is an approach to design that adheres to rales based on principles such as

None of these
data flow analysis
bottom-up design
top-down refinement
All of these

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

to identify the top level functions by combining many smaller components into a single entity
to prepare flow charts after programming has been completed
to identify a top level function an d then create a hierarchy of lower-level modules and components.
all of the listed here

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