Introduction: HTML5 Interview Questions and Answers
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“What is the difference between HTML and HTML5 ?”
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
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“What is the <!DOCTYPE> ? Is it necessary to use in HTML5 ?”
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).
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“How many New Markup Elements you know in HTML5”
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 <figure> For grouping a section of
stand-alone content, could be a video<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.
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“What are the New Media Elements in HTML5? is canvas element used in HTML5”
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>