System Analysis and Design
Which of the following statements is not true

pointers are useful in traversing a linked list
a checksum digit is used for detecting Errors in data transmission
All of these
None of these
at example of a hierarchical data structure is tree

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System Analysis and Design
Advantages of Relational Database Management systems are

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.
All of these
Flexibility, of relating different logical files

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