Edit: There is maybe one that’s semi-ok (reversing a linked list) but it’s not a red flag if an engineer can’t do it on the spot.
In my decade+ career, I’ve used a linked list in production code…… maybe twice? Thats not to say they aren’t useful, but I don’t make a habit of committing stuff to my memory unless I’m going to use it.
Could I do it? Absolutely. Could I do it without searching it up? Yea. Would I search it up anyway? 100%