To be successful in an interview, the important thing is to understand that an employer is looking for a solution, not a problem. And if you can prove yourself as a problem solver then the golden ticket is yours.
Facing an interview is an art. You might have very good knowledge and experience but it can’t guarantee that you will crack the interview. On the other hand, you might crack the interview even if you don’t have very good knowledge or experience.
That’s why cracking an interview is always referred to as more of a skill than knowledge. It is a skill, an art in itself. Consider interview as an opportunity rather than as an obstacle.