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HTML5 Interview Questions

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HTML5 is nothing more then upgraded version of HTML where in HTML5 Lot of new future like Video, Audio/mp3, date select function , placeholder , Canvas, 2D/3D Graphics, Local SQL Database added so that no need to do external plugin like Flash player or other library

The <!DOCTYPE> is an instruction to the web browser about what version of HTML the page is written in. AND The <!DOCTYPE> tag does not have an end tag and It is not case sensitive.

The <!DOCTYPE> declaration must be the very first thing in HTML5 document, before the <html> tag. As In HTML 4.01, all <! DOCTYPE > declarations require a reference to a Document Type Definition (DTD), because HTML 4.01 was based on Standard Generalized Markup Language (SGML). WHERE AS HTML5 is not based on SGML, and therefore does not require a reference to a Document Type Definition (DTD).

Below are the New Markup Elements added in HTML5

Tag Description
<article>Specifies independent, self-contained content, could be a news-article, blog post, forum post, or other articles which can be distributed independently from the rest of the site.
<aside>For content aside from the content it is placed in. The aside content should be related to the surrounding content
<bdi>For text that should not be bound to the text-direction of its parent elements
<command>A button, or a radiobutton, or a checkbox
<details>For describing details about a document, or parts of a document
<summary>A caption, or summary, inside the details element
<figcaption>The caption of the figure section
<footer>For a footer of a document or section, could include the name of the author, the date of the document, contact information, or copyright information
<header>For an introduction of a document or section, could include navigation
<hgroup>For a section of headings, using <h1> to <h6>, where the largest is the main heading of the section, and the others are sub-headings
<mark>For text that should be highlighted
<meter>For a measurement, used only if the maximum and minimum values are known
<nav>For a section of navigation
<progress>The state of a work in progress
<ruby>For ruby annotation (Chinese notes or characters)
<rt>For explanation of the ruby annotation
<rp>What to show browsers that do not support the ruby element
<section>For a section in a document. Such as chapters, headers, footers, or any other sections of the document
<time>For defining a time or a date, or both
<wbr>Word break. For defining a line-break opportunity.

Below are the New Media Elements have added in HTML5

Tag Description
<audio>For multimedia content, sounds, music or other audio streams
<video>For video content, such as a movie clip or other video streams
<source>For media resources for media elements, defined inside video or audio elements
<embed>For embedded content, such as a plug-in
<track>For text tracks used in mediaplayers

yes we can use Canvas element in html5 like <canvas></canvas>

Yes we can use below new input type Attribute in HTML5

telThe input is of type telephone number
searchThe input field is a search field
urla URL
emailOne or more email addresses
datetimeA date and/or time
dateA date
monthA month
weekA week
timeThe input value is of type time
datetime-localA local date/time
numberA number
rangeA number in a given range
colorA hexadecimal color, like #82345c
placeholderSpecifies a short hint that describes the expected value of an input field

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