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

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Computer Basic Information
Which of the following would most likely NOT be a symptom of a virus ?

None of these
Existing program files and icons disappear.
The CD-ROM stops functioning.
THe Web browser opens to an unusual home page.
Odd messages or images are displayed on the screen.

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