One introduction interview and one coding round were there, which was supposed to be followed by a take-home assignment. Another round was over the assignment, and one more round followed. The second round was easy, but the interviewers took a lot of time explaining the questions and kept changing them according to my answers. They also kept saying "no" because they were trying to get a specific answer rather than an answer that could be more obvious and optimized. I've not heard "no, but" so many times in an interview. It was like they were proving a point that you are wrong and I am right. Too rude.

Count the characters in a string.

Parse a nested JSON, but don't use POJOs.