System Analysis and Design
Advantages of Relational Database Management systems are

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

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System Analysis and Design
Sequential or series testing is

running the system with line data by the actual user
testing changes made in an existing or a new program
is checking the logic of one or more programs in the candidate system
making sure that the new programs do in fact process certain transactions according to Specifications

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