ho Ms. Shipra,
In an interview, you must prove that you are the best person for the job! of course, you must be prepared for your interview by learning for instance, what duties would you be expected to handle? It is also necessary to read the job description as required by the employer and probably, assess yourself if you will fit / qualify on the job they are looking for.
here are some of your qualifying factors you must highlight during an interview:
1. work experience
2. educational background
2. achievements (i.e. recognition, promotion, etc in your previous jobs)
3. rewards (if there are any, but not necessary).
you may also refer to this site: http://www.zindagee.co.uk/jobs/interview.htm