We've noticed that in interviews lately, applicants are caught off guard when asked questions that they may have spent considerable time answering in their essay responses in the application. Here are a few things to keep in mind when you are preparing for your interview:
1) It is possible that the person interviewing you has not read your essays. Sometimes the interviewer prefers not to be intimately familiar with your essay responses, so as not to be biased during the interview process.
2) We do not expect you to reinvent the wheel - if we ask you something that you have addressed in the application, it is okay to discuss the same example, situation, experience, etc. It is likely that the question will be framed in a slightly different way or there may be opportunity to expand upon what you did write about.
3) Even if the interview topic is the same as one that was addressed in your essay response, a conversation provides a very different perspective than an essay that has been thoroughly reviewed, edited, and finalized over a period of days, weeks, or months.
Hope this helps - good luck!