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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 OPT in any real system. We can, however, run OPT on a saved trace of memory accesses, to measure how our real algorithm compares with OPT for a given trace.
what is deckers algorithm
1. Draw a schematic diagram of a CMOS inverter and explain its operation. 2. Draw schematic diagrams of CMOS NAND and NOR gates, and explain their operation. 3. Explain what
Q. List three instances of deadlocks that aren't related to a computer system environment. Answer: Two cars passage a single-lane bridge from opposite directions.
Write a note on semaphores A semaphore is a tool meant for synchronizing multiple processes trying to access a shared variable. That is a semaphore is used to deal with the cri
Define System Call A system call is a request that is made by any program to the operating system for carrying out tasks - picked from a predefined set - which the said program
FIFO page replacement This is the easiest page replacement algorithm. Here the 1 st page toward the inside is the 1 st to leave that is the oldest page leaves. To execute th
What are the advantages of Linked allocation? The benefits are a. No external fragmentation b. Size of the file does not require to be declared
Define a loader that is executed when a system is first turned on or restarted? Bootstrap loader is executed when a system is first turned on or restarted
What is meant by demand paging? Explain. Demand paging is a technique to implement virtual memory. In demand paging simply when a page is required it is brought into memory. As
Q. Explain about Deadlocks? Deadlocks for (int i = 0; i // first find a thread that can finish for (int j = 0; j if (!finish[j]) { boolean temp = true; for
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