Operating System (OS)
File record length

should always be fixed
depends upon the size of the file
should be chosen to match the data characteristics
None of these
Should always be variable

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

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

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