Z2Data NET Developer interview questions

Was through a zoom session, engineer gave me solving problem and asked me to solve it in many ways to enhance Big(o). Second interview was not even logic as i had to go to cairo to discuss already information i had already spoke about in the interview. Team leader was very informative about the comoany business but i was not able to indeestand his accent most of the time. Also gave me a data base peoblem sql, mysql and asked me to solve it. Problem aolution was simply connecting 2 tables using joint with primary key. Team leader was educated but not very open to new solution as i suggested more easer way and he sayed wont be efficient while the algorithm was way better.