What are pseudo-classes?

What are pseudo-classes? CSS Interview Questions and Questions (Continued from previous question...) 42. What are pseudo-classes? Pseudo-classes are fictional element types that do not exist in HTML. In CSS1 there is only one element type which can be classed this way, namely the A element (anchor). By creating three fictional types of the A element individual style can be attached to each class. These three fictional element types are: A as unvisited link, A as active link and A as visited link. Pseudo-classes are created by a colon followed by pseudo-class's name.