There was online test followed by a technical interview in the office. Back in the days I was a student with a lack of C++ knowledge but with some experience of C and the trading domain. When the interviewers discovered that I don't have much chances to be accepted for the internship, instead of helping me out they started to make jokes about me and ask strange questions. I find it totally unprofessional and it definitely shows how they treat the personeel. Would not recommend anyone to work there.