Senior Frontend Developer

This is a good way to assess how your candidate approaches a basic chunk of work. Do they use snippets to quickly layout a basic HTML page, add a little jQuery and start coding? Or do they use a more in-depth approach such as Bower or Yeoman?

Continuous self evaluation is a must for a developer. You do not want to employ someone who continues to make the same mistakes.

This could be anything from the time they fixed the coffee machine, or helped a colleague fix their bike. It doesn’t really matter what they did — it just gives you an indication of how they solve problems and interact in the wider corporate environment.

CORS (Cross-Origin Resource Sharing) is a HTML5 staple that should be familiar to most front-end web developers. It allows you to request many different resources (jQuery, fonts, and so on) from a domain outside of the domain from which the resource came from.