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

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
which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
None of these
have both their operands in the main store.

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Operating System (OS)
Thrashing

always occurs on large computers
None of these
is a natural consequence of virtual memory systems
can always be avoided by swapping
can be caused by poor paging algorithms

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Operating System (OS)
The FIFO algorithm

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

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