First you will be having a screening round HR. Second round they will give you a coding test. I have done really very good in my test as per there requirements and I have verified my code with my seniors before sending it. There is just two lines of questions so many things you assume it and do it , the your assumption should match there assumption then you go to the next round which what I thought. I have written comments in my but still got the regret mail after one week.