I am a junior at University of Michigan studying CS.

I had two rounds of technical interviews and received an email for scheduling a follow up round which was additional to the original timeline. During the follow up round, I was asked Copy Linked List with Random Pointer which is LC medium problem. I spent about 30 minutes solving this problem and going through edge cases with the interviewer. I noticed that in contrast to the previous interviews, the interviewer was giving the minimum help throughout the interview. I solved the problem correctly but I am concerned since this is a follow up round and usually you have to solve two problems to pass the interview.

Does anyone else have experience with a follow up round at FB?