Difference of “ Who is he ?”, “What is he ?”, “Which is he ?”
“ Who is he ?” – Here who inquires about the name or parentage of some persons that has been named. The answer should be of the form he is Babulal, my friend.
“What is he ?”, here what inquires about the profession or social status. The answer should be of the form he is a doctor.
“Which is he ?” Here which inquirers about some particular person out of a definite group of persons. The answer should be of the form he’s the man with a black shirt.
( e) The interrogative is often used in exclamation in the sense of how great :
