System Analysis and Design
Structured Programming involves

localisation of errors
all of the listed here
functional modularisation
decentralisation of program activity

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System Analysis and Design
Advantages of Relational Database Management systems are

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

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System Analysis and Design
Unit testing is

making sure that the new programs do in fact process certain transactions according to Specifications
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
testing changes made in an existing or a new program

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