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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 are the objective of operating system assignment
LOOK o Like SCAN except stops moving inwards (or outwards) when no more requests in that direction exist. C-SCAN (circular scan) o Moves inwards servicing requests u
why we say " OS is a resource allocator" and “OS is a control program"?
Define a linker program A linker program links the program along with other programs required for its execution.
Synchronization can be achieved by means other than locks and condition variables. One alternative is semaphores. A semaphore is used to regulate traf?c in a critical section. A se
What are the disadvantages of linked allocation? The drawbacks are a. Used only for sequential access of files. b. Direct access is not supported c. Memory space neede
Define the Client - Server Communications Environment Today's client - server communications environment offers programmers great flexibility for application design. Applicatio
FIFO page replacement This is the easiest page replacement algorithm. At this juncture the 1 st page entering is the 1 st to leave that is the oldest page leaves. To execute
single pass assembler
what is difference between file descriptor and file pointer?
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