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Define FIFO Page Replacement Algorithm
This policy simply eliminates pages in the order they arrived in the main memory. By using this policy we simply remove a page based upon the time of its arrival in the memory. For instance if we comprise the reference string that is: 1, 2, 3, 4, 1, 2, 5, 1, 2, 3, 4, 5 and 3 frames (3 pages can be in memory at a time per process) after that we have 9 page faults as shown
The performance of a file system depends upon the cache hit rate (fraction of blocks found in the cache). If it takes 1 msec to satisfy a request from the cache, but 40 msec to sat
Declare some Applications of Open Source Systems • Finance • Educational • Data Storage and Management • ERP (Enterprise Resource Planning) •File Sharing & FTP
whta is an operating system ? what sorts services are provided by an operating system ?
What are race conditions? Race conditions are problems that take place due to the sharing of the same file by several processes. In such a case none of the processes is able to
Two Level Directory This kind of structure overcomes the problems of assigning unique names to the files. Thus there need not be any confusion among users. In this kind of s
Q. Why is it important to scale up system bus and device speeds as the CPU speed increases? Answer: Consider a system which carries out 50% I/O and 50% computes. Doubling-up
Question: a) What is an Input/Output module and what are the five categories their functions fall into? b) What is an Operating System? Briefly describe the two objectives
What are the three main activities of an operating system in regard to memory management? Keep track of which parts of memory are now being used and by whom. Decide which pr
Question 3: (a) Fincorp Ltd is an insurance company wishing to change over to a better business system using an improved version of a financial information system (FIS). The direc
trace the historical evolution of the operations managent from themainly rural agricultural era of the artisans to the present day industrial revolution, high technoligical advance
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