Prepare apti well. Even if you don't know the actual process, try the basics that you have learnt in schooling. Don't use any negative sentences. Try to be optimistic but don't over do it. Share your opinion confidently. If you feel it as do or die situation, then do it. Regretting for something you have done is better than regretting for something you haven't done. Have a knowledge on the words that you have mentioned in your resume. Do your preparation as much as you can. All the very best for your interviews. Do well! You'll definitely get some good results!