Commandments for every personal interview

Even after months of preparation, some candidates do not perform well inside the interview room.The trick is to follow the below commandments practice them during mock interview sessions diligently. You are sure to crack the personal interview.
1. Whenever the interviewer asks any questions, listen carefully. Do not interrupt him midway. Ask for a clarification if the question is not clear. Wait a second or two before you answer. And don't dive into the answer!
2. Speak clearly. Don't speak very slowly. Be loud enough so that the interviewers don't have to strain their ears.
3. Brevity is the hallmark of a good communicator. An over-talkative or verbose person is disliked and misjudged instantly, so keep it short.
4. If you don't know an answer, be honest. The interviewer will respect your integrity and honesty. Never exaggerate.
5. Never boast about your achievements. Don't be overconfident -- it is often misinterpreted by interviewers for arrogance.
6. Don't get into an argument with the interviewer on any topic. Restrain yourself, please!
7. Remember your manners. Project an air of humility and be polite.
8. Project enthusiasm. The interviewer usually pays more attention if you display enthusiasm in whatever you say.
9. Maintain a cheerful disposition throughout the interview, because a pleasant countenance holds the interviewers' interest.
10. Maintain perfect eye contact with all panel members; make sure you address them all. This shows your self-confidence and honesty.
11. Avoid using slang. It may not be understood and will certainly not be appreciated.
12. Avoid frequent use of words and phrases like, 'I mean'; 'You know'; 'I know'; 'Well'; 'As such'; 'Fine'; 'Basically', etc.
13. When questions are asked in English, reply in English only. Do not use Hindi or any other languages. Avoid using Hindi words like matlab, ki, maine, etc.
14. Feel free to ask questions if necessary. It is quite in order and much appreciated by interviewers.
15. Last but not the least, be natural. Many interviewees adopt a stance that is not their natural self. Interviewers find it amusing when a candidate launches into a new accent that s/he cannot sustain consistently through the interview or adopts a mannerism that is inconsistent with their own personality. It is best to talk naturally. You come across as genuine.