Box8 Product Developer interview questions

There was 2 rounds of interview. Both of them were over phone. First was fully technical about the ruby on rails and some logics, it went fine . The second was a managerial round and it was not a good experience, he was asking the work i have done and without im completing the answer he asked some other question and it went on like this and we ended the interview. Got the feedback that i lacked some skills and i dont have any idea what i missed