According to our habit of doing HR, we will write three grades of A/B/C on the interviewer's resume. Of course, A is the best grade. If it is excellent, we will also write A+ or A++, followed by B. The unsuitable candidate is C. Those who don't write A/B/C will basically not be considered. As for his writing F, I don't know what it means, whether to veto or not. According to the ranking, it should be hopeless. Let's get to the point!