I'm not opposed to leetcode questions, but if a junior engineer asks me a question literally from leetcode without changing the test details (IE, they just copy/pasted from the site instead of coming up with something slightly different), I exit the interview and email the CEO with an explanation (I'm very senior, so it makes sense to go straight the CEO).
Because of this, I have instead written my own interview questions that I administer. You won't find them in leetcode, and they're not particularly challenging- and it still filters out many terrible candidates.
Because of this, I have instead written my own interview questions that I administer. You won't find them in leetcode, and they're not particularly challenging- and it still filters out many terrible candidates.