What is the <!DOCTYPE>? Is it necessary in HTML5?

Name three ways to define a color in html?

How an index document is defined?

How can we embed video in HTML5?

Which video format is supported by IE?

What will the following code do? <audio src="song.ogg" controls="controls"></audio>

How will you define canvas with reference to HTML5?

What does a <hgroup> tag do?

What the use of Canvas Element in HTML5

How to add video and audio in HTML5