Operating System (OS)
The FIFO algorithm

executes first the job that last entered the queue
executes first the job with the least processor needs
executes first the job that first entered the queue
None of these
execute first the job that has been in the queue the longest

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Operating System (OS)
Addressing structure

All of these
None of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
defines the fundamental method of determining effective operand addresses

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