Context:
1: Who the hell he is? 2: Who the hell is he?
I have come across both of them and both of them are spoken frequently, so which is correct grammatically?
English Language Learners Stack Exchange is a question and answer site for speakers of other languages learning English. It only takes a minute to sign up.
Sign up to join this community1: Who the hell he is?
is not a question. It is a clause that probably wouldn't stand alone. You could use it like this:
I don't care who the hell he is.
2: is correct as written.