1. Introduction: An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system. Application programs usually require an operating system to function. For any computer to function‚ it must have an operating system (OS). A powered computer with no operating system will only display coded text messages only understandable to the computer
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don’t override the changes of another user. 3. System portability A major contribution of the UNIX system was its portability‚ permitting it to move from one brand of computer to another with a minimum of code changes. At a time when different computer lines of the same vendor didn’t talk to each other -- yet alone machines of multiple vendors -- that meant a great savings in both hardware and software upgrades. It also meant that the operating system could be upgraded without having all the customer’s
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Operating System | Assignment #1 | | Information System | 2012-03-29 | | 1. What is the purpose of interrupts? What are the differences between a trap and an interrupt? Can traps be generated intentionally by a user program? If so‚ for what purpose? (Chapter 1) Interrupt is that causes a computer processor to temporarily stop executing its current program and execute another program instead‚ finally returning control to the original program. So it prevent that more important task
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1. In a multiprogramming and time sharing environment‚ several users share the system simultaneously. This situation can results in various security problems. a. What are the two such problems? Ans: The two problems in Multiprogramming and time sharing environment are Stealing or copying a user’s files; Writing over another program’s (belonging to another user or to the OS) area in memory; Using system resources (CPU‚ disk space) without proper accounting; Causing the printer to mix output by
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2.1 TYPES OF OPERATING SYSTEM A. Batch Operating System- Batch processing is the most primitive type of operating system. Batch processing generally requires the program‚ data‚ & appropriate system commands to be submitted together in the form of a job. Batch operating systems usually allow little or no interaction between users & executing programs. Examples of such programs include payroll‚ forecasting‚ statistical analysis‚ & large scientific number-crunching programs. Serial processing combined
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Internet Operating Systems Andrew S Minette POS/355 University of Phoenix Internet operating systems‚ or Web operating systems‚ are not operating systems per say. There are more of user interfaces. An operating system is dependent on system hardware and uses hard disk space on a user computer to install and store applications. Web operating systems‚ however‚ depend on traditional operating systems to run an instance. According to Jonathan Strickland or How Stuff Works‚ while there may not
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Operating system virtualization is a method of altering a standard operating system so it may handle multiple users all at the same time. These individual users would not have any interaction with one another. Their information would also remain separate‚ even though they are using the same system. While this technology has several uses‚ the most common uses are in hosting situations and server consoladation. With operating system virtualazation‚ a single system is set up to operate like several
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changing an operating system......... An operating system is the program that manages all the application programs in a computer system. This also includes managing the input and output devices‚ and assigning system resources. Operating systems evolved as the solution to the problems that were evident in early computer systems‚ and coincide with the changing computer systems. Three cycles are clear in the evolution of computers‚ the mainframe computers‚ minicomputers and microcomputers‚ and each
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Operating System Security Abstract Information systems are now becoming the social infrastructure so it is necessary to improve the security level because of privacy and data theft. One of the important issues which have to concern in the security of cyberspace is the security of operating system. This paper helps us to know about the security of most commercial Operating system like UNIX and Microsoft windows which are widely using in whole world. Introduction Computer system from
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Operating System Comparisons PRG/355 February 4‚ 2013 Operating System Comparisons Table of Contents Introduction 3 Memory Management 3 Process Management 6 File Management 7 Security 8 Conclusion 9 References 11 Introduction An operating system (OS) is software that manages the hardware and software resources of a computer system. Basically an OS is a set of libraries or functions which programs may use to perform specific tasks relating to interfacing
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