There is no wrong answer to a behavioral interview question. The main goal of a behavioral interview is to determine previous behavior because previous behavior is the best indicator of future behavior. So it is best to answer those type of questions with your experiences, even as a student. But, in questions that you think you have not had any experience to share, honestly inform the interviewer that "I haven't experienced that but in case that will happen, I will blah..blah..blah." Remember that the HR is just measuring your compatibility in the organization and the job you are applying for. Do not take everything personally. So, good luck!!!