Generally, the interview process is never long, half-an-hour at the most, and the questions are very specific to the course and student. Rarely would it sway beyond the information you’ve already submitted as part of your visa process.
So basically, the interview is all about assessing you, and gaining clarity on all the documents you have already submitted to them. In short, they want to see why you should be granted a visa.
First and most important tip: Get your facts straight! Don’t exaggerate or lie about anything during the course of your interview. Remember, they already have all your educational and financial documents, and the consular officer is trained to spot any hint of lies.
Interviewer asks you probing questions like:
1) Why did you choose this destination?
2) Why not study in India?
Consular officers are fond of asking 'What if...' type questions to test your motivations. Be prepared to answer them. Below are some examples of such questions:
3) What if someone offers you a job in the US after your studies?
4) What if someone offers you a partnership in his business?
Do the groundwork and look into the university you are applying at. Look closely into the course you’ve chosen and ask yourself if your choice is in line with your educational goals. The interviewer may wish to know your reasons for choosing a specific program and university, and when he pops out that question you must be able to answer it hesitation-free. You may have to face questions concerning your financial status; so look into your bank balance and be sure of your financial plan. If your parents are retired, or you lack sufficient funding, then the interviewer may ask you to explain how you plan to fund yourself. Look presentable, dress smart and approach the interview calmly. Don’t go there prepared to recite memorised answers. They don’t want a parrot. They are looking to see if you are clear with your objectives. Work on the simple etiquettes of conversation. Be polite and courteous in your response. Listen carefully to the questions and wait for your turn to answer. A little patience and good manners goes a long way. Be confident when meeting the visa officer; don’t fidget around the desk or look too nervous. Also, don’t pick an argument with the officer during your interview. If language is not your strong point then brush up on your grammar and speaking skills. You must convince the visa officer that you are competent enough in English to study in a foreign country. If you are asked to bring any documents for the interview, then ensure you have them all sorted before you get there. You may be asked to bring a passport, various forms, passport-size photos, test scores, educational certificates, transcripts, bank statements and other related documents. You may have some original documents, like your birth certificate, printed in Tamil or Hindi; get them translated to English and notarized for the visa office.