Operating System (OS)
Feed back queue

are very easy to implement
dispatch tasks according to execution characteristics
None of these
are used to favor real-time tasks
require manual intervention to implement properly

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Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

they are available on magnetic tapes
they are initially stored on disk
they are memory resident
they are partly in primary memory and partly on disk
None of these

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

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

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