While I agree that it won't tell you if a candidate is good, it will often show very quickly that a candidate is absolutely terrible.
My warm-up questions are usually something like "reverse a singly-linked-list" or "check if a string is a palindrome", and you would be surprised at how many people have just no clue on how to do it, even with a lot of help (and I work in a FAANG so we should be getting decent candidates).
My warm-up questions are usually something like "reverse a singly-linked-list" or "check if a string is a palindrome", and you would be surprised at how many people have just no clue on how to do it, even with a lot of help (and I work in a FAANG so we should be getting decent candidates).