What are two important programming paradigms for JavaScript developers?

One is the Object-Oriented Programming model and the other is the Functional programming model. OOP is where you have JavaScript objects that contain data and functions used to alter application information. Functional programming uses code written in a series of functions that can produce mathematical calculations.

What happens if you overlap sets of tags?

If two sets of HTML tags are overlapping, only the first tag will be recognized. If the problem exists then text will not display properly on the web browsers screen.

How do margin, border and padding come together in the box model?

Padding surrounds the content withing your element. To add bulk to your content use padding. Margin adds empty space around your element while the border runs around the padding and signifies the edge of the element content.