Overview of Functions of an Operating System Norman Matloff University of California‚ Davis ©2001‚ N. Matloff May 30‚ 2001 Contents 1 Introduction 1.1 It’s Just a Program! 1.2 What Is an OS for‚ Anyway? 1.3 A Bit More on System Calls 1.4 Making These Concepts Concrete: Commands You Can Try Yourself 2 System Bootup 3 Application Program Loading 4 Timesharing 4.1 Many Processes‚ Taking Turns 4.2 Example of OS Code: Linux for Intel CPUs 4.3
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Information Technology | Unit number + Title | 2. Computer Systems | Assignment number + Title: | 1. Decoding the Jargon | Assessment Criteria: | P1 P2 M1 | Purpose / Aims (learning outcomes) | LO1 Understand the components of computer systemsP1 Explain the function of computer hardware componentsP2 Explain the purpose of operating systemsM1 Compare the features and functions of different operating systems | Introduction (Scenario) | You have been approached by
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1. Introduction: Gone are the days when operating systems meant Windows or Linux or Mac. In the present days operating systems also mean Symbian‚ Android‚ Windows Phone‚ iOS or Blackberry OS.A mobile operating system is the operating system which controls the mobile device like how Windows or Linux controls a desktop or laptop. Smart phones‚ PDAs‚ tablets are few devices which run on Mobile operating system. People use smartphones for many purposes. The basic needs of mobile phones have changed
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capable of handling many programs/processes at any single time‚ a program is essential where the different processes of programs are manages and all given time to be processed by the CPU. The CPU has its limitations and cannot process anything at once. Enter the process Scheduler. The Scheduler helps the CPU by assigning the next process to be processed by the CPU Body In all the operating systems‚ schedulers are a critical component of the CPU to getting processes done. Allowing fairness between
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1.The four major functions of an operating system are: Managing programs Managing Memory Handling input and output User Interface Managing programs Managing programs is one of the functions that are most dramatic effect to the operating systems overall quality. There are many different systems that are used for managing programs. You have single tasking‚ in which you can run only one program application at a time. Multi-tasking in which in the normal operating system allows a single user to
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Some Beneficial Features of the UNIX Operating System CIS 155 Some Beneficial Features of the UNIX Operating System Safety issues have always been one of the major aspects of effective operation of human beings and systems invented and implemented by individuals all over the world in different periods of human history. The rise of the personal computer in the market is another potential threat; nowadays this threat comes from the internet through computers and other devices
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Operating System UNIT - 1 Roadmap • What is an Operating System? • • • • • • • • Operating System Objectives/Functions The Evolution of Operating Systems Major Achievements Structuring methods Design of API’s Interrupts Device Organization User/System state Transition What is an Operating System? • A program that acts as an intermediary between a user of a computer and the computer hardware. OR • A program that controls the execution of application programs. • Kernel – the one program
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Operating system ABCs An operating system‚ or OS‚ is a software program that enables the computer hardware to communicate and operate with the computer software. Without a computer operating system‚ a computer would be useless. Operating system types As computers have progressed and developed so have the operating systems. Below is a basic list of the different operating systems and a few examples of operating systems that fall into each of the categories. Many computer operating systems will
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of innovation and technical excellence‚ he was awarded the Bell Laboratories President’s Award for three different projects-the QTM Project (1998)‚ the DataBlitz Project (1999)‚ and the Netlnventory Project (2004). Professor Silberschatz’ writings have appeared in numerous ACM and IEEE publications and other professional conferences and journals. He is a coauthor of the textbook Database System Concepts. He has also written Op-Ed articles for the New York Times‚ the Boston Globe‚ and the Hartford
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for the user. It is used for developing applications found in our computing machines. It is used in almost all the technologies offered in the market. Companies use it to produce applications for developing games‚ entertainment‚ and the like for different types of technologies promoted. As time goes by developers become extra competitive‚ software and/or application advertised by the companies become more and more sophisticated and more advance. Since the “programming” topic is so main stream nowadays
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