Operating System (OS)
The term "operating system" means

None of these
the way a computer operator works
the way a floppy disk drive operates
a set of programs which controls computer working
conversion of high level language into machine code

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Operating System (OS)
Virtual Memory

None of these
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.
consists of those addresses that may be generated by a processor during execution of a computation.

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Operating System (OS)
File record length

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

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