If you're lucky, you'll get an interviewer who thinks that if you can solve a case insensitive palindrome, it means you should be hired with strong confidence.
But if you're unlucky, you'll end up with a person who will squeeze the last ounce of blood out of you, and even if you solve 99% of the questions correctly, he will still think you're low confident or even a no-hire because you missed that one edge case...