Lec01&02-Introduction & Overview

Lec01&02-Introduction & Overview - National...

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Operating System Spring 07 National University Prepared by Uzma Maroof uzma.maroof@nu.edu.pk
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2 Introduction Introduction This course uses things from many other courses: Languages Data structures Logic Design This course
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3 Books Books Text Book: Operating System Concepts, 6 th Editon, Silberschatz Galvin Gagne Reference Books: Modern Operating Systems, 2 nd Edition, Andrew S. Tanenbaum Operating Systems, 4 th Edition, William Stallings
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4 Important Issues Important Issues Cheating will not be tolerated Implementation has a lot of weightage
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5 Tentative” Grading Tentative” Grading Assignments 15% Project 15% Quizzes 10% Midterm I 12.5% Midterm II 12.5% Final Exam 35%
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6 What are your expectation from What are your expectation from this course??? this course???
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7 What is an Operating System? What is an Operating System? It is a program! Top-down view Provides an extended or virtual machine abstraction to user programs Easier to program than the underlying hardware. All services are invoked and accomplished through system calls. Bottom-up view Acts as a resource manager of a complex system Resources consist of processors, memories, timers, disks, keyboard, network interfaces, printers etc. OS manages allocation of these resources to user programs in an orderly and controlled manner
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8 What is an Operating System? What is an Operating System? OS do nothing by themselves. Similar to subroutine libraries, do nothing unless they are invoked by programs Act as an intermediary between users and the hardware
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9 Two Goals of Operating Two Goals of Operating Systems Systems Manage hardware resources System operates smoothly: efficiently, reliably, securely Present abstract system model to programmer Simple and convenient access to and control of resources
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This note was uploaded on 01/23/2011 for the course ASD 123 taught by Professor Hasd during the Spring '07 term at Alfaisal University.

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Lec01&02-Introduction & Overview - National...

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