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Question 5: a) Concerning OS security, outline the difference between MAC and DAC. b) In terms of OS memory management, discuss the difference between virtual

Question 5: a) Concerning OS security, outline the difference between MAC and DAC. b) In terms of OS memory management, discuss the difference between virtual memory and physical memory. c) With respect to memory management paging algorithms, discuss the operation of the FIFO versus the OPT algorithm. d) Why is the OPT algorithm said to idealistic and not practical to implement?

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