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.
All of these
None of these
Flexibility, of relating different logical files
Security controls can be more easily implemented.

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System Analysis and Design
Positive testing is

testing changes made in an existing or a new program
running the system with line data by the actual user
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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