DEKA Research and Development Controls Engineering interview questions

Applied online and got an email from the HR to set up an interview. Had an interview with one of the engineering supervisor. Got a call after 45 minutes of pre-decided time. It seems like he was not interested. He directly started with technical questions. Interview lasts about 20 minutes. No reply from HR. Waited for 10 days and asked for decision and got rejected. He asked around 8 technical questions and I answered 7 of them perfectly. They don’t deserve good candidates.