Two candidates attend a selection interview for a job. One shows
confidence and is well prepared: the other is uncertain and nervous.
How would the two candidates communicate these contrasting
impressions?

The confident candidate will take over the job interview, by showing
that he knows far more about the company than the interviewer and by
posing lots of challenging questions.

The nervous candidate will try to hide, possibly under the
interviewer's desk and he will have to be coaxed into making any sort
of response.

Of course, neither of them will get offered the job.