HTML 5 Question : If I do not put <! DOCTYPE html> will HTML 5 work? Answer : No, browser will not be able to identify that it’s a HTML document and HTML 5 tags will not function properly. Diff between HTML 5 Layout and HTML 4 or previous HTML? Answer : A typical web page has headers, footers, navigation, central area and side bars. Now if we want to represent the same in HTML 4 with proper names to the HTML section we would probably use a DIV tag. But in HTML 5 they have made it more clear by creating element names for those sections which makes your HTML more readable. Below are more details of the HTML 5 elements which form the page structure. <header> : Represents header data of HTML. <footer> : Footer section of the page. <nav> : Navigation elements in the page. <article> : Self-contained content. <section> : Used inside article to define sections or group content in to sections. <aside> : Represent side bar contents of a...