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What is the basic approach of page replacement?
If no frame is free is available, find one that is not presently being used and free it. A frame can be freed by writing its contents to swap space, and changing the page table to show that the page is no longer in memory. Now the freed frame can be used to hold the page for which the process faulted.
KERNEL ACTIVITY FOR ULTS: The kernel isn't aware of thread activity but it is still managing process activity. When a thread compose a system call the whole process will be bl
How do we overcome the disadvantages of the two-level directory? Give links from one user directory to another, creating path names; system files become available by letting th
Write an application that does the following:(1) fill an array with 50 random integers; (2) loop through the array, displaying each value, and count the number of negative values;
Write a short note on file organization and access. There are three methods to access files 1Record Access 2Sequential Access 3Random Access The record access
In a table format, discuss the differences between the fixed partition and the variable partition memory organization in terms of the basic idea, memory structure, advantages
Essential Properties of Operating System 1. Batch: Jobs with similar needs are batched together and run through the computer as a group by an operator or automatic job sequen
What are the services provided by the operating systems? Program Development It provides a variety of services and facilities, such as debuggers and editor, to help the
Contiguous allocation: Every file will be allocated contiguous space in the memory. Allow the block size be 1K If a 50K files desires to be allocated space after t
List disadvantages of using a single directory. Users have no privacy. Users must be careful in choosing file names, to avoid names used by others. Users may destroy each othe
Parent and Child process communicate in unix A child and parent can interact through any of the normal inter-process communication schemes (pipes, message queues, sockets, s
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