Operating System (OS)
The FIFO algorithm

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

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Operating System (OS)
The Register - to - Register (RR) instructions

have both their operands in the main store.
which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
All of these
which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, except in the case of store operation when it is also
None of these

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