Interpersonal communication is probably the most challenging area of managerial communication. This so happens because, every human being has the right to refuse to be part of a conversation. No amount of force can guarantee that the other party is actually listening. Hence, a managers communications style needs to have an element of persuasion in it. Only the tool of persuasion can increase the possibility of participation of the other party in a conversation. This has to be complemented by refined communication skills.
The case in point are interviews. Giving an interview is an art. Contrary to most of our thoughts, interviews these days are in no way a willingness of the interviewer to know you. Few jobs and many applications gives them this liberty (I am, of course, not considering the IT sector of India which is in need of a lot of talent). Hence, it is important that with each question, the interviewee puts forth her candidature with assertion. Interviewees commonly answer the questions put to them literally and hence fail. Only if with each answer a candidate proves a point about her characteristics can she, at the end of an interview, be sure of the success. At the end of each answer, the interviewer should have some additional information about the interviewee which reinforces her application for the job. This art of giving a convincing interview can be perfected by some persistent practice though, it must be admitted that interviews can place even the best in a spot. Hence all the more reason to develop this skill!
This is a good site to start off the interview preparations.