Operating System (OS)
File record length

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

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Operating System (OS)
Thrashing can be avoided if

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

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