Please provide your answers to following four possible first interview questions:

Why do you think sites like Amazon have been so successful with consumers?
Were planning on developing a powerful omni-channel capability that would allow consumers to combine online and in-store shopping and purchasing, including same-day pickups at our stores. What do you think are the key success factors for this effort? What are some of the challenges?
How can we best use social networks and mobile platforms to drive sales?
Our focus is on luxury products that are differentiated from other mass market retailers, online and offline. How should this influence our m-commerce efforts?