For Romeo and Juliet most of the questions that come up are the main scenes and questions about the characters. It is important to know important quotes and to pick them out and learn them off also to know important scenes like the balcony scene the fight between Mercutio and Tybalt and obviously the final scene. You can find summaries of these scenes online and you should also pick out some quotes and techniques used. You may be able to prepare an answer ahead of the exam and then alter them in accordance with the question( depending on it! ). I hope this was of help. GOOD LUCK!