System Analysis and Design
Unit testing is

is checking the logic of one or more programs in the candidate system
running the system with line data by the actual user
None of these
making sure that the new programs do in fact process certain transactions according to Specifications
testing changes made in an existing or a new program

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System Analysis and Design
Advantages of Relational Database Management systems are

None of these
Security controls can be more easily implemented.
All 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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