OS(CSE-08)
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Consider requests to access the cylinders of a disk in the following order: 116, 22, 3, 11, 75, 185, 100, 87. Using the SCAN scheduling algorithm, what is the order that the requests are serviced, assuming the disk head is at cylinder 88 and moving downward through the cylinders?
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Suppose we have the following page accesses: 1 4 2 3 4 2 3 4 5 2 2 1 5 6 1 2 and that there are four free frames within our system. Using the LRU replacement algorithm, what is the number of page faults for the given reference string?
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In a computer system there are 9 tape drives and N processes are competing for them. Each process may need 3 tape drives. The maximum value of N for which the system is never in a deadlock.
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Asynchronous writes to a file system are generally more efficient than synchronous writes.
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Consider a memory system with 64-bit logical address for a two-level paging system with 64 KB page size. The outer page table has 1024K entries. Find out how many bits are used to represent the second-level page table?
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Process spending more time in paging than executing is referred as ____.
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A 32-bit logical address with 64 KB page size will have 65536 entries in a conventional page table.
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An interrupt priority scheme can be used to ____.
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Use of virtual memory normally decreases the degree of multiprogramming in system.
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External fragmentation does not occur in a segmentation system.
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