System Analysis and Design
Advantages of data base system is (are)

storage space duplication is eliminated
all applications share centralized files
all of the listed here
data are stored once in the data base and are easily accessible when needed

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

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

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