Actually more than three, but the three main ones:

	HTML

	CSS

	JAVASCRIPT


1.  What is the clearest indicator that HTML is to follow?

	How about CSS?

	How about JAVASCRIPT?


2.  What is the delimiter between multiple HTML tags?
	Between multiple HTML tag ATTRIBUTES?

	What is the delimiter between CSS statements?

	What are the delimiters between JAVASCRIPT statements?

3.  Which does FONT SIZE=3 belong to?

	How about position:relative?

	How about font-size:10pt?

	How about OnMouseover?

	How about COLOR=red?

	How about foo.color='red'?

4.  Which is best supported across platforms? 
	Which is most user-friendly?
	Which is most forgiving of programmer error?
	Which is most powerful at controlling the look?
	Which is most powerful for controlling dynamics?