quick, Operating System

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why we say " OS is a resource allocator" and “OS is a control
program"?

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The optimal replacement policy, called OPT, is to evict the page which will be accessed farthest into the future. Since we can't predict the future precisely, we can't implement OP

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Write note on process, process state? A process is in excess of the program code which is sometimes known as text section. It as well includes the current activity as represent

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Problem: (a) Modern operating systems are interrupt driven. If there are no processes to execute, no I/O devices to service, and no users to whom to respond, an operating syste

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What is graceful degradation? In multiprocessor systems, failure of single processor will not halt the system, but only slow it down by sharing the work of failure system by ot

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Consider a particular system that does not have an interrupting clock.  The only way a thread can lose the processor is to voluntarily surrender it.  Additionally, the operating sy

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Buddy system of memory allocation Free memory is used to maintain in linked lists, each of similar sized blocks. Every block is of size 2^k. When some memory is needed by a th

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