Operating System (OS)
File record length

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

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Operating System (OS)
Memory

is typically characterized by interactive processing and time-slicing of the CPU
is a sequence of instructions
is a device that performs a sequence of operations specified by instructions in memory.
None of these
is the device where information is stored

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