There are two common types in page replacement algorithm: stack and non-stack strategies. When a real page number increase only

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问题 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(     ).

选项 A、FIFO
B、LRU
C、PFF
D、OPT

答案A

解析
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