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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.
Q. What is the use of system programs? Answer: System programs are able to be thought of as bundles of useful system calls. They provide fundamental functionality to users so
RESOURCE ALLOCATION GRAPH When a process Pi wishes an instance of resource type Rj, a request edge is inserted in the resource allocation graph. When this request is able to be
FIRST FIT ALGORITHM Scanning a list along with if a free hole is available with necessary space for the process to allocate it allocates the process in that space. The first s
Q. Give the reasons why Windows XP, Solaris and Linux implement multiple locking mechanisms. Explain the circumstances under which they use mutexes, spinlocks, semaphores, adaptiv
explain the link between operations management and strategic planning of daily goods shop
Q. Why would it be an awful idea for gateways to pass broadcast packets between networks? What would be the merite of doing so? Answer: All broadcasts would be spreads to all
IMPLEMENTATION OF SEGMENTATION WITH AN EXAMPLE Segmentation is a memory-management scheme that represents the user view of memory. A logical address space is the collection of
Banker's Algorithm In this analogy Customers ≡ processes Units ≡ resources, say, tape drive Ba
What is bounded buffer
Consider a computer system with a 32-bit logical address and 4KB page size. The system supports up to 512MB of physical memory. How many entries are there in a conventional single-
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