Everyone is nervous about interviews. If you simply allow yourself to feel nervous, you’ll do much better. Remember also that it’s difficult for the interviewer as well.
In general, be upbeat and positive. Never be negative.
Rehearse your answers and time them. Never talk for more than 2 minutes straight.
Don’t try to memorize answers word by word. Use the answers shown here as a guide only, and don’t be afraid to include your own thoughts and words. To help you remember key concepts, jot down and review a few keywords for each answer. Rehearse your answers frequently, and they will come to you naturally in interviews.