Operating System (OS)
All the time a computer is switched on, its operating system software has to stay in

floppy disk
main storage
disk drive
None of these
primary storage

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Operating System (OS)
A Processor

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

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