1. Briefly‚ what is an operating system? An operating system serves as a hardware/software interface‚ acts as a repository for common‚ shared routines and defines a platform for constructing and executing application software. 2. An operating system presents an application programmer with a relatively "friendly" hardware/software interface. What does this mean? Why is it important? The user interface‚ sometimes called the shell‚ provides a mechanism for the user and application programs to communicate
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error or by a specific request from a user program that an OS service be performed .Dual-mode Operation allows OS to protect itself and other system components whereas Multimode Operation increasingly CPUs support multi-mode operations. System call provides the means for a user program to ask OS to perform OS tasks on the user program’s behalf. When a system callis executed‚ it is treated by H/W as a S/W interrupt. Timer protects CPU resource from getting stuck by a user program. To ensure OS maintains
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Basketball Playing Badminton Reading Books Listening Music Surfing Internet Working on Computer OUTPUT [pic] Practical – 3 Create a menu or table of content web page. Each menu item or section of the table of content should load a different web page. HOME PAGE HOME Online store RESTAURANT & BAKERY HOME MENU SPECIALS BAKERY CONTACT US Before visit a location take a peek at all location restaurant menus & see what we have to offer for breakfast & dinner Some existing
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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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TYPES OF OPERATING SYSTEM Real-time Operating System: It is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior. The main object of real-time operating systems is their quick and predictable response to events. They either have an event-driven or a time-sharing design. An event-driven system switches between tasks based of their priorities
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HISTORY OF OPERATIMG SYSTEMS Operating systems (OS) provide a set of functions needed and used by most application programs on a computer‚ and the linkages needed to control and synchronize computer hardware. On the first computers‚ with no operating system‚ every program needed the full hardware specification to run correctly and perform standard tasks‚ and its own drivers for peripheral devices like printers and punched paper card readers. The growing complexity of hardware and application programs
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in UNIX‚ that would eventually take the form of an operating system kernel‚ Linux version 0.01. Linux evolved into a fully functioning Operating System (OS) with one of its first distributions created by the Manchester Computing Center‚ MCC Interim Linux‚ using a combined boot/root disk (Hayward‚ 2012). Linux luminaries‚ Slackware‚ RedHat and Debian began to rise between 1992 and 1994 as well as the Linux kernel growing to version 0.95‚ becoming the first kernel to run the X Windows System. The
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CVE listing is a dictionary of publicly known information security vulnerabilities and exposures. IT is hosted by the Office of Cybersecurity and Communications at the U.S. Department of Homeland Security 5. Can Zenmap GUI detect which operating systems are present on IP servers and workstations? Which option includes that scan? Yes‚ the OS detection using TCP/IP stack fingerprinting option includes that scan. 6. If you have scanned a live host and detected that it is running Windows
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Overview of Mobile Operating Systems Today Samuel Echevarria Lee University February 29‚ 2012 Abstract The paper discusses the importance of mobile operating systems in today’s world‚ while also giving a brief overview of the important mobile OS’s that are popular in the US. Advantages and disadvantages are analyzed within each mobile OS and will give an insight as to which mobile OS caters to a user’s or business need. This is done by evaluating the smartphone market (market share‚ hardware sales
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"UNIX was the first operating system designed to run on dissimilar ’ computers by converting most hardware specific commands in machine language into an independent programming language called C ’" . UNIX was the basis of AT&T ’s telephone system and the government ’s wide area network system. Then it became the basis of communication between engineers and scientists‚ and eventually the basis of communication for everyone worldwide. It has held this remarkable spot since 1969. However‚ in
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