System Analysis and Design
Which of the following is not a part of a Data Flow Diagram?

arrow
None of these
process represented by a bubble circle (circle)
disk storage
Data store

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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.
Flexibility, of relating different logical files
None of these
All of these

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