Could you perceived yourself as the person who may be chosen as the ideal candidate for the job
? Who are the other candidates? Also, there is a large part of subjectivity in a job interview and there is nothing you can do about it. Describe who you are and what you know, answer honestly and in some cases, with some strategy, those all the things that you can do. The rest is up to the interviewer. Accept this fact and be yourself. Assume who you are and know how to say it is the key that will get you to have a good interview and to be selected for a position which really suits you. If you are well prepared, you will enjoy describing who you are and what you can do to your recruiter without cold sweats.