Question: a) Explain how programs can access data from memory when using virtual memory b) Describe the following page replacement algorithms. i) First in first out

a) Explain how programs can access data from memory when using virtual memory
b) Describe the following page replacement algorithms.
i) First in first out (FIFO)
ii) Optimal page replacement (OPR)
iii) Least recently used (LRU)

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