1st round (Coding): It was Leetcode hard, which was surprising to me as this was an interview for an internship. It was the LC 297 (Serialize and Deserialize Binary Tree). I managed to provide a solution, but I am not sure if it was the correct one, but the interview went well overall. 2nd round (Research): It was a discussion with the hiring manager. During the first half of the interview, we discussed about one of my previous papers. In the second half, we discussed about my workflow when it comes to research and there were a also few behavioural questions.