Which one of the following is correct?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Here are the two sentences

*I've absolutely no frigging idea who is he".

or

“I’ve absolutely no frigging idea who he is.”

Thanks in advance.

2

‘… who he is.’ is the correct version.

Just in case you don’t already realise it, this is not a polite phrase. Some people could be offended by use of the word ‘frigging’ as it is based originally on a profanity.

3

Thanks. I saw that sentence in a book.