I had a first interview with the hiring manager about core hadoop & spark (MLlib & streaming) that led to the paired coding interview as the next step. On Coderpad I was given the choice to opt the runtime environment and I did Java as I had done for all my interviews. The interviewer called 5 mins late and I had another 40 mins for coding itself. He said this question has multiple parts and you get past one part to the next one upon its correct test case pass. I thus took the time to explain my approach to him during and after each part. By the end of the time I got to finish three parts correctly. I still remember him saying "you did well - good luck with the next round!" But a few days later the recruiter calls me to discuss the feedback. And I was utterly shocked by that. The interviewer had fed back that the question had 6 parts and I completed only 3 parts. So in his view I was not a fit! At that moment it was even hard to explain my view or ask why if there were a total of 6 parts, it wasn't stated at anytime during the interview. But overall I felt lack of attention and decision making with this interview.