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Difference between Linux and Unix-computer world

Difference between Linux and Unix LINUX Cost :   Linux can be freely distributed, downloaded freely distributed from magazines, books etc. Developed : Linux Kernel is developed by the community. Linux Torvalds oversees things. Price : Free but support is available for a price. Security : Linux has about 60-100 Viruses listed  till date. None of them activity spreading nowadays. Architectures : Originally developed for Intel x86 hardware, ports available for over two dozens CPU types including ARM. Examples : Ubuntu Fedora red hat, debia, Android etc. Processor : Dozens of different kinds.  UNIX Cost : Different flavors have different cost. Developed : Three biggest distributions are Solaris , IBM and HPUX.  Price : some free development use but support is available for a price.  Se curity : A rough estimate of Unix virus is between 85 - 120 viruses reported till date.  Examples : OS X, Solaris, all Linux  Processes : x86/x64, spar,...
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What is world wide web-computer world

  What is world wide web The world wide web is a collection of millions of file stored on thousand of computers all over the world. These files represent text document, pictures, videos and just about any other kind of information that has even been recorded in computer files. The web is the largest and most diverse collection of information ever assembled.   The world wide web is consists of large number of websites that contain a number of web pages which is maintained by the various web server.  Websites are collection of web pages  A web page is a HTML document In 1980, Tim Berners-Lee, contractor at the European organisation for nuclear research built ENQUIRE, as a personal database of people and software models. In 1984 berners-lee returned to CERN, and considered its problems of information management physics from Around The World needed to share data. In 1993 there are 50 Web Services across the world. In 1994 the total number of website was still minute comp...
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Single partition allocation, Multiple-partition allocation and Fixed Equal-size partitions in operating system-computer world

  Single partition allocation, Multiple-partition allocation and Fixed Equal-size partitions in operating system Single partition allocation In this scheme operating system is residing in law memory and user process are executing in higher memory. Advantages It is simple  It is easy to understand and use Disadvantages User job is limited to the size of available memory. It leads to poor Utilization of processor and memory. Multiple-partition allocation  It is the simplest method for allocating  memory is divided memory into several fixed size partitions. Fixed Equal-size partitions It divides the main memory Into equal number of fixed sized partitions, operating system occupies some fixed portion and remaining portion of main memory is available for user processes. Advantages It supports multi programming. A process whose size is less then or equal to the partitions size can be loaded into any available partition. Disadvantages If a program is big to fit in...
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Difference between HTML and DHTML-computer world

     Difference between HTML and DHTML  HTML is a markup language, while DHTML is a collection of Technology.  DHTML creates dynamic web page, whereas HTML create static web page.  DHTML allow including small animations and dynamic menus in web pages but HTML is not able to do so.   HTML used events, methods, properties to insulate dynamism in HTML pages.   HTML is used to describe the web page but DHTML is a collection of JavaScript and style sheet in an HTML page. HTML sites will be show upon client side Technologies, while  DHTML site will be fast enough upon client side Technologies as most of entries are checked on browser itself and not waste time rendering to server for mistake.  HTML creates a plain web page without any style and scripts called as HTML. Whereas,  DHTML creates a page with HTML, CSS,DOM And scripts called as DHTML.  HTML cannot any server side code but XHTML may contain server side code.  ...
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Distributed transaction model-oocomputerworld

  Distributed transaction model Distributed transaction model:- To access the various data items in a distributed system is usually e accomplished through transaction there are two type of transaction that we need to consider The local transaction The Global transaction    The local transaction:- The local transaction are those that access and update data is only one local database.  The global transaction:- global transaction are those that access and update data in several local database in the case of global transaction the task is more complicated since several nodes may be participating in execution the failure of a communication link connecting these nodes may result in erroneous computation.  System structure :- Each node has its oven local transaction manager whose function is to ensure those transaction that execute at that site. The various transaction manager corporate to execute global transaction. To understand how such a manager can be impl...
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