Somewhere, I have read an article in this regard, which is reproduced below:
1.Being not prepared well about the Defence org
2. Never try to cover up a wrong answer with lies.
3. For the question - 'Tell us something about yourself':
• Tell only positive things about yourself in a limited sentences.
• Your education, experience, something that you are good at... Make sure that whatever you say highlights those skills which are required for the job for which you are being interviewed.
4. You should show your ‘I can do it’ / ‘I will do it’ attitude throughout your interview.
5. NEVER bring up money matters
6. While discussing your weaknesses or mistakes:
Even when the interviewer asks you the standard interview question, 'What's your biggest weakness?” DO NOT mention your real weaknesses or the mistakes that you've made . You have to be prepared in order to answer this question in a diplomatic manner.
7. Do not boast about Yourself
8. Asking about Wage, Vacation, Perks etc.
9. Avoid using negative language during your interview.
10. Using “I don't know”, “no idea” & ”Umm..Sorry, don’t know”
Don’t use such phrases or sentences.
11. Also avoid talking in an over stylish manner .