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

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

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Operating System (OS)
Memory management is :

replaced with virtual memory on current systems
critical for even the simplest operating systems
None of these
not used on multiprogramming systems
not used in modern operating system

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Operating System (OS)
Thrashing can be avoided if

the pages, belonging to the working set of the programs, are in main memory
the speed of CPU is increased
None of these
the speed of I/O processor is increased
All of these

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Operating System (OS)
Feed back queue

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

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Operating System (OS)
System maintenance:

is not required if the system is well written
is usually not necessary
always requires several programs
None of these
is necessary on all systems, regardless of how good

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