单项选择题

There are two common types in page replacement algorithm: stack and non-stack strategies. When a real page number increase only stack algorithm can increase the hit rate monotonously. In the following replacement algorithm, which one belongs to non-stack strategy( ).

A．FIFO
B．LRU
C．PFF
D．OPT
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单项选择题
A memory--memory, machine instruction for a certain machine has the following format. (Such an instruction is similar to a register—register instruction except that the operands are displaced addresses in memory.) Which of the following could be an assembly language instruction that would be translated into a memory—to—memory instruction for this machine( ).
A．ADD 10(R1) ,20(R2)
B．ADD(10R1), (20R2)
C．ADD R1,10(R2),20
D．ADD R1,10,20(R2)
单项选择题
A virtual memory system has five virtual pages numbered zero through four and three page frames. All the page frames are initially empty. How many page faults are generated with the following access sequence using a FIFO replacement policy ( ) 0 1 2 3 0 1 4 0 1 2 3 4
A．8
B．9
C．10
D．7
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