Computer Basic Information
An essential difference between the operating system that runs a typical desktop computer and the operating system that runs a typical PDA is that .......

the desktop computer has an OS whereas a PDA does not.
the desktop OS has a graphical user interface whereas the PDA OS does not.
the desktop OS manages hardware resources whereas the PDA OS does not.
None of these
the desktop OS can run several programs simultaneously whereas the PDA OS cannot.

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Computer Basic Information
Which of the following is not true of a magnetic disk?

It is expensive relative to magnetic tape
It does not provide an automatic audit trail
Users can easily update records by writing over the old data
It provides only sequential access to stored data
All of these

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