Interviews are normally conducted by most Graduate Business and a few Engineering schools, in order to determine the strengths of applicants for their respective programs. At the undergraduate level, for Bachelors and other programs, interviews are very rare and only in cases where universities need further information to determine aid or other benefits to the applicants

The Most Likely Asked Questions are:

What are you doing now?

Describe your occupation and the ways in which it is relevant to your chosen field of study. If your current employment is not particularly relevant to your academic plans, do not linger in discussing it but go swiftly on to and emphasize your extracurricular activities, which must relate to your planned study if your current occupation does not.
If what you say can draw the interest of the interviewer, most of the rest of the interview may be based upon what you have already said. That can eliminate the formality of the interview structure, allowing you to discuss more naturally what you have done.

What is the greatest challenge in your field of study (in your country)?

What do you believe to be root problems in your chosen field? Or, what do you believe to be the weakest point in current approaches to problems? Review such elements in advance, grounding your opinion with facts. It is good if you have a potential solution of your own to discuss. May be such problems relate to what you see as your own personal challenge in your field (which you may also be questioned about specifically)-also define your personal challenges for yourself and be sure to discuss them at the interview.

What disciplines in our curriculum are the most appealing to you?

You have to know details on the institution’s curriculum before the interview (and you had better have them before writing your personal statement). It is understood that you will be familiar with the curriculum from the materials that you have been provided with by the university.
Choose three (the number usually asked) areas most attractive to you among the courses. Preferably, choose areas from the core or major areas of concentration (not those from the introductory term or those weakly related to the field’s stem). Be prepared to explain your choices.