In my experience, for most of these type of interviews the answers you give aren't necessarily that important. It gives the interviewer a way to see how you respond.

After all, any technical details can be read off your CV and then confirmed with a couple of questions, but at the end of the day any manager worth their salt should be interested in you as a person, your aspirations, your drive and passion.

I always recommend people go for lots of interviews - not just ones for jobs they want - for practice!