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

Which of the following is true about <video controls="controls" preload="auto"> <source src="song.mp4" type="video/mp4" /> </video> ?

What attributes are correct for <canvas> tag?

Which of the following creates a button that empties the form for the user to begin again?

Which attribute specifies the element's text directionality?

Which of the following attributes is responsible for subtitle of a video inside element?

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

Javascript function lineTo() is used to draw line on element:

What is true about HTML5 Application Cache?