Operating System (OS)
The primary purpose of an operating system is:

To allow people to use the computer
To keep systems programmers employed
To make the most efficient use of the computer hardware
To make computers easier to use

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Operating System (OS)
Which of the following statement is true.

None of these
Thrashing is a natural consequence of virtual memory systems.
Seek analysis is used for analysing control-unit busy problems.
All of these
The LRU algorithm pages out pages that have been used recently

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