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Operating Systems Q2. What are Semaphores? Explain the different kinds of Semaphores. Q3. Explain the Dynamic Storage-Allocation Problem. Q4. What is Fragmentation? Q5. Given page

Operating Systems

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Q2. What are Semaphores? Explain the different kinds of Semaphores. Q3. Explain the Dynamic Storage-Allocation Problem. Q4. What is Fragmentation? Q5. Given page reference string: 1,2,3,4,2,1,5,6,2,1,2,3,7,6,3,2,1,2,3,6 where the number of frames in the memory is four. Compare the number of page faults for LRU, FIFO and Optimal page replacement algorithm

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