System Analysis and Design
Pointers are useful in

Traversing a linked list
Pointing mistakes in input data
Locating a particular sector of a magnetic disk
All of these
None of these

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System Analysis and Design
A menu-driven system

presents options and allows the user to make selections
can be used only by computer professionals
increases the operator's work
None of these
is required only for on-line systems

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System Analysis and Design
Indexed-Sequential organization

means storing records in contiguous blocks according to a key
stores records sequentially but uses an index to locate records
has records placed randomly throughout the file
uses an index for each key type

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