Computer Basic Information
A beam of light used to record and retrieve data on optical disks is known as

coloured light
None of these
laser
unpolarized concentric light
polarized light

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Computer Basic Information
The CPU of a computer transfers print output to a temporary disk memory at high speed and then gets back to processing another job without waiting for the output to got to the printer. In this way, the CPU does not remain idle due to its own high speed as compared to the low speed of the printer. What is the name of this memory?

External memory
None of these
I/O memory
ROM
Buffer memory

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Computer Basic Information
A URL is:

An acronym for unlimited resources for learning
The address of a document or page on the world wide web
A computer program
A type of web server

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

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