An interview is a conversation where an interviewer asks a candidate questions to evaluate them for a job or gather information. There are different types of interviews like face-to-face, behavioral, telephone. To prepare, candidates should research the company, prepare answers to common questions, and decide what to wear. On the day of the interview, candidates should arrive early, greet the interviewer positively, make eye contact, speak clearly, and thank the interviewer before leaving. Common interview questions assess why the candidate wants the job and is qualified for it.