Theoria Medical Full Stack Developer interview questions

At first, I had the usual interview with the HR/Recruiter, and after that, I took a live coding exam around dawn - PH Time. I passed the examination which consisted of 2 medium algorithms and 1 complex (extremely hard) mathematical problem. The next step was an interview with one of the technical interviewer. The interviewer was late for our interview and was not well-prepared with the questions. I felt that, they interviewed me extemporaneously and assumed that I was not capable of handling databases because I was unable to effectively explain "SQL indexes," despite having a strong track record of experience.