<i>Computer Science is a three year degree at least - you can&#x27;t spend an hour talking about it?</i><p>Sure, you could spend all day or all week talking about it.  But the question is, do you <i>need</i> to, and is it a useful thing to do in a job interview setting.  But I&#x27;m biased here, because I&#x27;m generally not a fan of day long job interviews.  I don&#x27;t think they&#x27;re necessary or practical, at least for most roles.