They usually have 2 technical rounds but after i had cleared them, they realized i never worked on any big data project so they were skeptical on my selection. They then decided to call me for a 3rd round of technical interview. I answered all the questions in the round and was pretty confident on my selection and was so told by the person interviewing me also that the interview was satisfactory. But then i didnt get any response back from the HR. I have been atleast asking for a feedback also but its all in vain.