System Analysis and Design
Advantages of Relational Database Management systems are

Data independence since it allows the database to grow by adding new attributes and relations.
Security controls can be more easily implemented.
None of these
Flexibility, of relating different logical files
All of these

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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 a top level function and then create a hierarchy of lower level modules and components
to prepare flowcharts after programming has been completed
to identify the top level functions by combining many smaller components into a single entity.

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