Where should <meta charset="utf-8" /> be placed?

What can you give a name to a group of input fields within a fieldset?

Which of the following is incorrect to set the loop attribute of <video> element in HTML5?

Which of the following is true after the browser fires an `updateready` event?

An <article> can contain <section> elements.

What does 'id' stands for?

Using HTML5, what is the most semantic way to group a section of ads?

What does the action attribute in a <form> element do?

<keygen> tag element is new in HTML5.

How should you create a link for your website allowing users to email the webmaster if the webmaster’s email address is webmaster@xcompany.com?

Which event will the browser fire after checking all files in the cache manifest for updates, and finding several files that need to be updated?