System Analysis and Design
Advantages of data base system is (are)

all applications share centralized files
storage space duplication is eliminated
all of the listed here
data are stored once in the data base and are easily accessible when needed

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

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System Analysis and Design
A couple:

means that the upper module has the capability of calling the lower module
None of these
is a data item that moves from one module to another
None of these
is represented by a line joining two modules

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