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

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

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Operating System (OS)
A Processor

is the device where information is stored
is a device that performs a sequence of operations specified by instructions in memory.
is typically characterized by interactive processing and time of the CPU
is a sequence of instructions
None of these

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