Is it permissible for a female student to review old exam questions that are prohibited from circulation, in order to understand the professor's style in setting questions, despite knowing that they are rarely repeated in exams?

You must refer to the responsible authority at the university to inquire about the limits of their prohibition on photographing questions, and whether it is permissible for students to view what has been circulated. What they permit is not objectionable, and what they prohibit must not be transgressed.