Q/A with CEO of world's biggest e-commerce website - What should I ask?

Hello HN, I am going to meet the CEO of world's biggest e-commerce website next week. Please suggest me, what kind of questions should I ask? What would you ask? Some typical questions like "what made you so successful?" or "how do you see XYZ Corp as a tough competitor and what are you doing to face them?" or something different?! Personally, I am a techie and aspire to be an entrepreneur.