The interview was about 45 minutes long. Basic Java questions were asked. The questions were not too hard. Basically you have to work out the problem on a white board and it can be stressful. Be sure to understand the question correctly and let the interviewer follow your thoughts. The interviewer was friendly. I do not think they prepared much for the first round interview. Maybe they just want to find out if you can code or not. There is no advancement of the problem, and problems are unrelated.