Question

"what are you doing rohit" kapil asked (rewrite the sentence using proper punctuation marks)

Answer 1

Hi thank you for asking the question. This is a simple sentence the only punctuation you need to use are a full-stop (.) at the end of sentence and a question mark (?) at the end since the word where clarify us that a question is being asked.and a coma to separate the two parts of the sentence
so by adding these punctuation the sentence will look like this:
What are you doing Rohit?,Kapil asked.
Hope this answer helps you and suffice your question.thanks.

Answer 2

“What are you doing Rohit?”, Kapil asked.

A question mark needs to be added after the question and a full stop after the sentence.

Since the question is being asked from third-person's view, the question should be put in quotes and the question mark is to be followed by a comma.