Operating System (OS)
All of the following are task performed by the operating system except

Performing housekeeping task like file compression and disk defragmentation
Provides an interface for user to interact with computer
Controlling the access that application program has to the CPU
Managing hardware on the computer

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Operating System (OS)
The advantage(s) inherent to using high level languages is (are)

Improved debugging capability, and superior documentation
A greater degree of machine independence
Fewer people, less management and shorter transition in learning time
None of these
All of these

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