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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 Two-level directory In the two-level directory structure every user has own user file directory (UFD). When a user jobs begins or a user logs in, the system's master fi
What is an acyclic graph? A tree that has been corrupted by links to other branches, but does not have any cyclic paths in it.
Define Name of some language processors? Name of some language processors are as follow: Assembler, Compiler and Interpreter
Explain the Request or Response interface The Request/Response interface is ideal for a message based client-server interaction. By modeling components to interact via a reque
Consider the following snapshot of a system, answer the following questions using the banker's algorithm: 1. What is the content of the matrix Need? Is the system in a safe stat
This exercise uses a graph-plotting program ( gnuplot ) to convert tabular data into an image. This is a technique that is very widely used to visualize scientific data; with app
Sharing segments between processes without requiring the same segment number is possible in a dynamically linked segmentation system. a. Define a system that permits sta
Linked list allocation using index The blocks don't have a fixed size. Pointers are utilized to point to the next block in a file. The pointers are set aside as a separate tabl
Define the Executor (Worker Thread) The responsibility of the Executor (or Worker Threads) is to execute instructions on behalf of a client-server connection. The Executor mus
Under what circumstances would a user be better off using a time-sharing system, rather than a personal computer or single-user workstation? When there are some other users, th
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