Robert Bosch Project Trainee interview questions

There were two rounds for interview. In technical interview, they asked me about basic electronic circuits such as rectifiers. Then about transients and R, L and C. Basic op-amp circuit. I was asked to draw the circuit diagram of inverter. Further, he asked me to interface a hex-keypad with a micro controller. After giving all those answers, I went to HR interview. In HR also they asked me about the recent projects and how can you make some improvement. After that I was selected.