System Analysis and Design
The model base cannot be prepared until

None of these
both (a) and (b)
the MIS staff has been acquired and organized
the computer has been selected
the preparation of physical facilities

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System Analysis and Design
Advantages of Relational Database Management systems are

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

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