My interviewer was very chill. We started with a standard behavioral question, and he asked a couple of follow-ups. For the technical portion, the first question I got was Valid Parentheses. The second, follow-up question was how I would implement the stack I used in the last question using two queues (reverse of the Leetcode question Implement Queue using Stacks). I did not need to actually write any code for the solutions, the interviewer was satisfied with my verbal responses.