<p>I agree with Alexandre. But, sometimes, interviews can be very informal. And, for applicants applying outside of the UK, it is an alumnus or alumna who will be interviewing the applicant. It helps when the interviewer knows your family name (connection) and can vouch for the impeccability of your family’s name in the society you live in. There were cases in the past where the applicants were not interviewed and were given offers just by submitting grades and other requirements. Of course, their grades were very impressive. Cambridge does not tell you this, but I think they want to choose students who are either top 1 or top 2 in the whole graduating class, unless you come from a top feeder school like Eton, Westminster School, Harrow or Charterhouse School which send students to Cambridge is a somewhat massive number. And, by massive, I mean 9 or 10 students in a year.</p>