The interview is an opportunity for the Admission committee to know you better. Study your application carefully and try to think of possible questions the committee may have, or areas that require an explanation. A typical question that IT applicants face is on their relatively frequent job switching.
Most importantly, the committee is interested to know about your leadership experience, and your learnings from your work experience.
What you will not be asked: General knowledge, current affairs unless there has been a significant event in the industry of your interest. It is not a stress interview, so there's no need to get defensive about your answers. Be confident, but also open to being convinced. Treat it as a conversation.