I applied through college or university. The process took 3 months.

First round was in person, he said the interview will last only 60mins, started off with my resume and asking about my past experiences, asked some hr related questions with respect to my past experience. Then he asked a medium arrays question to solve by hand.

Second round was online, it was to design a backend service for bidding system for an advertising agency.

1. Array with property that each element is either +2 or -2 of the previous element, you have to find the first occurrence of 0, optimal solution.
2. Design backend service of a bidding system for an advertising agency.