Some general tips that I can offer that you can follow when attending an interview. Sourced from my personal experiences attending interviews and taking interviews. More coming soon.

• Don't. Get. Nervous. Speak freely but not like you are talking to your best friend. This is the one single greatest tip that I can give. Don't ever get nervous and think too much about what the interviewer might think of you. Instead, simply speak freely and don't worry too much.
• We are there to evaluate your thought process and most of us don't even need a correct answer but as long as you try and figure your way to the correct answer. Think out loud. Tell why you took that approach and be vocal about it.