overview of Unix operating system. It starts by presenting a brief history of the early development of Unix. It concentrates on main aspects of Unix operating system. Key concepts covered are interactive multi-user operating systems‚ the design objectives of Unix‚ file-store organization‚ text processing and programming‚ the role of C programming language with regard to portability and reliable system software‚ process control (signals and fork)‚ error logging and recovery from system failures‚ modifiability
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Advait 1. If following equations? A) b) c) d) Aptitude Test TCS-1 Awareness Development Initiative is a root of which of the ‚ where b is a rational number‚ then 2. From the top of a tower of height 180 m the angles of depression of two objects on either sides of the tower are 30° and 45°. Find the distance between the two objects. a) b) c) d) 3. A amount of 20‚900 is taken as loan at 9% p.a.‚ compound interest. If it is to be repaid in 2 equal annual instalments‚ what is the value of
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1. AIM: To write a C program to simulate the shortest job first algorithm with preemption. DESCRIPTION: For implementing SJF algorithm with preemption‚ we consider the arrival times of each process‚ the burst times of all the previously arrived processes. After the arrival of all the processes into the ready queue‚ the average waiting time and turn around time can be calculated by using the above algorithm. ALGORITHM: 1) start 2) read the no of processes to n 3) initialize i to 0 4) if
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The Purpose of an Operating System Professor John St. John COMP 129 – PC Hardware and Software October 2‚ 2014 Some professionals in the Information Technology (IT) field might describe the Operating System (OS) of a Personal Computer (PC) as its software brain. Jean Andrews‚ Ph.D.‚ describes an OS this way: “An operating system is software that controls a computer. It manages hardware‚ runs applications‚ provides an interface for users‚ and stores‚
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1. Introduction to Operating System:- Computer is a somewhat complex machine. The world has become accustomed to so many choices. One of the major choices in the modern era is the “Operating System (OS)”. Operating systems are the central software component to any computer. The main brands of operating system are; Windows Mac OS‚ Sun Solaris‚ UNIX‚ DOS and Linux. Each brand has its own take on what makes up an operating system. Windows is the most commonly used operating system around the world.
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Advantages: Information technology (IT) benefits the business world by allowing organizations to work more efficiently and to maximize productivity. Some of the advantages that IT can have on our enterprise are given as following. 1. Storage: Information technology creates electronic storage systems to protect our company’s valuable records. 2. Automated Process: In business‚ people look for ways to do more work in a shorter amount of time. IT improves our company’s efficiency by developing
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Advantages and disadvantages of networks I’ll start by saying that setting up a network is a serious job and should be done only by a person that is already familiar with the process of networking. The variety of options for setting up a home network can influence on a decision regarding the equipment needed to be purchase. Before deciding what hardware to buy you must first find out which type of network technology to use (by ’type of network technology ’ I mean the way computers connect to
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File Systems The file system provides the environment for working with files and folders. Windows uses FAT12‚ FAT16‚ FAT32 and/or NTFS with NTFS almost always being the best choice. Linux also has a number of its own native file systems. The default file system for Linux used to be ext2‚ now it is typically ext3. MS-DOS used to be and Microsoft Windows continues to be the most popular operating system for 80386‚ 80486‚ and Pentium PCs. Because Linux started on 80386/80486 PCs‚ a connection
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Topic: Comparing the security of Windows 7 to a Linux based operating system General Purpose: To inform Specific Purpose: At the end of my speech‚ my audience will be able to differentiate the two operating systems security. Central Idea: Comparing the security of Windows 7 to a Linux based operating system Introduction: Good evening‚ I am here tonight to explain the very basic securities of two very different operating systems. Windows 7 has been out for a couple years now and has what some
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Components of an Operating System In order to perform the actions requested by the computer’s users‚ an operating system must be able to communicate with those users. The portion of an operating system that handles this communication is often called the user interface. Older user interfaces‚ called shells‚ communicated with users through textual messages using a keyboard and monitor screen. More modern systems perform this task by means of a graphical user interface (GUI) in which objects to be
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