The document type declaration tag is first tag in your in your HTML document, before the other html tags. It is not an HTML tag; it is an instruction that gives to the web browser about which version of HTML the page we are using. DOCTYPE Declarations In HTML 5 version<!DOCTYPE html> In HTML 4.01 version This DTD consist all HTML tags. but no include deprecated tag for example font. Frames are not allowed in this version. <!DOCTYPE HTML PUBLIC "-//Type here.../DTD HTML 4.01//EN" >
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At the foundation of every HTML file is a set of structure tags that divide an HTML file into a head section and a body section. These two sections are enclosed between an opening <HTML> tag and end with the closing </HTML> tag. Following is a simple example of an HTML file that highlights the structure tags that are required within every XHTML file: Head Section Contains the tile of webpage and information pertaining to the entire Web page. Contains any “meta” tags. The meta tag shown in the example below is required in all XHTML files. Nothing in the head section is visible in the browser window except for the title, “My Webpage” that is found between the title tags (<title>My Webpage</title>). Body Section Contains the file contents that are visible in the browser window. In other words, whatever you find within the body tags is what you will see in the browser window! Viewed in its entirety using a browser, the Web page would loo
HTML stands for H yper t ext M arkup L anguage, and it is the is a language used to develop Websites or Pages. HTML is also Known as markup language. Like author languages HTML also code. Hypertext refers to a text by clicking on that text the user redirect to linked document. Markup Language HTML is also markup language because its tags tells the web browser How to display the content withhin tags. What is an html File? HTML is a format that tells a computer how to display a web page. The documents themselves are plain text files with special "tags" or codes that a web browser uses to interpret and display information on your computer screen. ƒ HTML stands for Hyper Text Markup Language · ƒ An HTML file must have an .htm or .html file extension Why is HTML important? • HTML is the foundation of all Web pages. • For the same reasons we learn how to perform mathematical operations long-hand before we use a calculato
An array is a linear collection of finite number of homogeneous data elements that store in a successive memory locations. Size of array In case start index zero. size=Upper Bound-Lower Bound+1 In case start index one. size=Upper Bound TYPES OF ARRAY One dimensional array Two dimensional array Multi dimensional array ONE DIMENSIONAL ARRAY One dimensional array is a array in which each element of array refer by single or one subscript. Example:-A[1],A(1) TWO DIMENSIONAL ARRAY Two dimensional array is array in which each element of array is refer by two subscript.Two dimensional array structure require to store data in a form of table. Example:-A[1,2],A(1,2) MULTI DIMENSIONAL ARRAY Multidimensional array is array in which each element of array reffer by two or more subscript. Example:-A[1].......A[n]; LINEAR ARRAY A linear array is a list of a finite number n of homogeneous data elements such that the elements of the array are stored in su
An operating system is a program that acts as an interface between the software and the computer hardware. It is an integration set of specialized programs that are used to manage overall resources and operations of the computer. It is a specialized software that controls and monitors the execution of all other programs that reside in the computer, including application programs and other system software. Example of Operating system Window 95 Window vista Window 7 The main Goals and Objective of Operating system are: To make a computer user friendly. Proper utilization of computer resources. To hide the details of the hardware resources from the users. To provide users a convenient interface to use the computer system. Characteristics of Operating System Memory Management - It keeps track of primary memory, i.e. what parts of it are in use by whom, what parts are not in use, etc. Allocates the memory when the process or program requests it. Processor Man
A language that is acceptable to a computer system is called a computer language or programming language. A computer language consists of all the symbols, characters and rules that permit the user to communicate with the computers. Computer Languages is broadly classified into the following three categories: 1. Machine Language 2. Assembly Language 3. High Level Language Machine Language Machine Language is the language directly understood by a computer without any language translator. Any information or instruction in this language is to be represented in terms of 0’s and 1’s . A machine language instruction normally has a two-part format 1. First part of an instruction is the operation code, which tells the computer what function to perform. 2. Second part is the operation, which tells the computer where to find or store the data or instructions. Advantages : Machine language is directly understood by CPU and it takes shorter time for execution than a progra
Definition A computer network is a group of computer systems and other computing hardware devices that are linked together through communication channels to facilitate communication and resource-sharing among a wide range of users. Networks are used for the following key reasons: 1. To facilitate communication via email, video conferencing, instant messaging etc. 2. To enable multiple users to share a single hardware device like a printer or scanner. 3. To enable file sharing across the network. 4. To allow for the sharing of software or operating programs on remote systems. 5. To make information easier to access and maintain among network users. Basic Elements of a Network There are three basic components/Elements of Computer Network 1. Sender: Creates and sends a message 2. Medium : Carriers a message. This is a communication stream through which the data is being transmitted. For example – Cable media or wireless media . 3. Receiver: Receives