I wish we all collectively decided not to buy into this bullshit interview process anymore. and force a change. I've been in this industry 40 years, fuck off with your "reverse a string" test. There are decent libraries to do most shit asked on an interview.
I like to think I'm a great people manager with good technical skills. I build skilled and productive, but happy teams. If you're hiring me into a manager or director role, don't you fucking dare ask me to traverse a tree. Yes I can, but if that's what your managers are doing, I don't want to work for you anyway.