Operating System (OS)
The main function of the dispatcher (the portion of the process scheduler) is

swapping a process to the disk
assigning ready process to the CPU
suspending some of the processes when the CPU load is high
bring processes from the disk to the main memory
None of these

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Operating System (OS)
Thrashing can be avoided if

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

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