Introduction to UNIX - UNIX past and present Learning...

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UNIX past and present Learning objective After completing this topic, you should be able to discuss the history of UNIX and its continuing significance as a technology. 1. UNIX philosophy UNIX is arguably one of the most powerful operating systems in use today. It has seen widespread use by major corporations and institutions since its inception over three decades ago. Its popularity stems from its flexibility, power, and versatility, which it draws from its basic design principles. These principles encompass much of the UNIX philosophy, and include the following: simplicity reusability portability simplicity UNIX tries to keep every task simple. Rather than being made up of a few complex applications, UNIX consists of a large number of very simple applications. This increases overall efficiency because each program does one thing well, resulting in less wasted system resources. reusability UNIX's simplicity extends to reusability. The large number of small, efficiently written programs in the system makes developing new applications faster, because you can utilize existing programs in your code. portability Much of UNIX is open source, which makes it highly portable. You can view and modify such code and recompile it, allowing you to run UNIX on just about any hardware. For many organizations, this means being able to extend the life of their existing hardware without constantly having to upgrade to meet the demands of their operating system software. Question One of the features that make UNIX so powerful is that most of its file formats are open. Which format do most UNIX configuration files use? Options: 1
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1. ASCII 2. RTF text 3. UNICODE Answer Most UNIX configuration files are standard ASCII, so users can use simple text editors to configure the system. Option 1 is correct. ASCII files are known as plain-text files. These files use 8-bit codes 0-255 for printable and non-printable characters. Specifically, ASCII (American Standard Code for Information Interchange) uses codes 48-122 for the alpha-numeric characters 0-9, a-z, and A-Z. Any application can read ASCII format. Option 2 is incorrect. The Rich Text Format (RTF) specification is a method of encoding formatted text and graphics for easy transfer between applications. RTF is not as open as ASCII, because users depend on special translation software to move documents between different MS-DOS®, Windows, OS/2, Macintosh, and Power Macintosh applications. Option 3 is incorrect. Unicode provides a unique number for every character, no matter what the platform, application, or language. ASCII represents apha-numeric characters as 8-bit codes, which limits the number of possible characters to 256. Unicode uses 16-bit codes and so is capable of representing Far- Eastern languages that have higher numbers of characters. 2. Origins of UNIX
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Introduction to UNIX - UNIX past and present Learning...

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