What is the proper syntax for adding placeholder text to a text input?

Controls attribute in <video> element doesn't include

Which of the following languages will you use to paint the graphics designed using the HTML 5.0 <canvas> tag?

What is the correct email input tag?

Which of the following defines a part of a document, that would still make sense out of the context of its webpage (like a news article)?

HTML5 was partially created by WHATWG and:

Please select the allowed pragma directives (http-equiv attributes on a meta element)

HTML5 provides the really nice template element, which is used to declare fragments of HTML that can be cloned and inserted in the document by script. Which answer is true for the template element?

How many h1 elements are recommended on a single page?

Custom data attributes (data-*) are very useful for storing data private to a page or application.

Select the valid HTML elements designed for user interaction that can be clickable and editable,