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What are the three main purposes of an operating system?
_ To give an environment for a computer user to implement programs on computer hardware in a convenient and efficient manner.
_ To allocate the separate resources of the computer as required solving the problem given. The allocation process should be as fair and efficient as possible.
_ As a control program it serves two major functions: (1) supervision of the implementation of user programs to stop errors and improper use of the computer, and (2) management of the operation and control of I/O devices.
Explain about threading issues? The fork and exec system calls In a multithreaded program of few UNIX systems have chosen to have two versions of fork, one that duplicates e
What is a Process Control Block? Every process in the operating system is represented by a process control block as well called a task control block. It contains several pieces
Q. What is Multiprogramming? Multiprogramming When two or more programs are in memory at the same instance, sharing the processor is referred to multiprogramming opera
Problem 1. What is kernel? What are the main components of a kernel? Defining Kernel Explaining Main components of Kernel 2. What is mutual exclusion? What are i
Q. What are two differences among user-level threads and kernel-level threads? Under what situations is one type better than the other? Answer: (1) User-level threads are un
Explain Swapping Swapping is a method of temporarily removing inactive programs from the memory of computer system.
what is I/O management Linux
Write in brief on UNIX file structure. UNIX considers every file to be a sequence of 8-bit bytes no interpretation of these bits is made by the operating system. This system pr
A UNIX file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contains 10 direct entries, and one single, double, and triple indirect entry
What is an I/O subsystem? The control of devices connected to the computer is a main issue while designing operating systems. Since I/O devices differ widely in their function
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