There is a mark for review option so you can flag questions you want to return to. I'm not sure about 'highlight' though.

Sir,

I just want to know whether highlight and mark questions option is there in real PMP exam?

Could you please clarify based on my below concerns:
1.Bcz during exam I want to highlight those questions which if needed I can come back and check again.
2.I want to mark those questions which are related to performing calculations like EV, Critical path etc to which I can also come back and check again.

thanks