Your nervousness may even indicate how valuable
getting this job is to you. If you weren't nervous, and you act like a
happy-go-lucky person, you might be perceived as someone who is not very
interested in the job.
The interview not only functions as a way of
determining who among the applicants is most capable of performing the job
well, but it is also a means of allowing the interviewer to get to know more
about the applicants. It's a first encounter with an individual that you might
soon work together with. If that’s the case, then the interviewer (who could be
your boss) should actually feel the same way as you are. Nervousness often
accompanies excitement.