Which HTML specification contains definitions for the elements: <article>, <nav>, <header> and <footer>?

Which of the following is the correct doctype declaration for HTML5?

<pre> tag defines:

Choose the valid HTML comment.

What is the preferred way for adding a background color in HTML?

What symbol differentiates most opening tags from closing tags?

Each type of media player has various tag ____ that can be used.

To link to a document, you must specify its ____.

To create a button that will clear the form fields, you use a type of ____.

The last item in an html document must be the ____ tag.

The first section of an html document is called the ____ section.