Anticipate that the interview will be conducted in English.
Interviews are generally very brief.
Keep answers to the officer's questions short, but to the point. Do not take family members or friends with you to the interview. Do not state that you intend to work in the United States, even temporarily, after completing your studies. If you are married, especially with children, and your family is remaining behind in your own country, be prepared to address how they will support themselves in your absence. You must show sufficient financial resources to support dependents.