Look at the requirements of your school, demanding questions are many and difficult, demanding natural questions are simple. If you are prepared, you can definitely answer them. The key is to communicate with the tutor and ask him how to reply to general papers and common questions. At that time, the main questions asked in our thesis defense were: the idea and significance of your doing this topic, the meaning of some keywords in it, why you should do it in a certain way, and so on. Defense is not that terrible. Good luck.