1) You can talk about what is the most important aspect of studying (in your own opinion). Which way works best for you, perhaps memorising works best for you? Or you need to study in an extremely quiet environment. Using myself as an example, i always do study planning 1 month ahead of exam and follow through my study plan without fail. That would ensure that I can revise all the chapters on time and concurrently I do not sacrifice my resting time, as having enough rest ensure that I can perform 100% in exams.

2) "I'm happy to stay for as long as there is still space for me to grow within the organisation." <--Generic answers =x

3) I believe the best way is to admit that you don't know. In terms of technical question, it's either Yes or No, there's no answers in between. You could go with "I'm sorry but i'm not too sure about it. However, i see myself as a fast-learner and I'm confident that I can picked up the knowledge during work/ would definitely equip myself with that knowledge before i join the organisation"