The interview lasted for around 1.5-2 hours. It was a panel interview (interviewers consisted of HR and the Senior Head). The HR was not very friendly and he kept pushing the interviewee to give the answer that the HR wants. The interview with the HR lasted for around 45 minutes. I did the interview with the Senior Head for around 15-20 minutes and I did a short quiz test around 20-30 minutes that test my software knowledge skills (C++, Python, and SQL)