 Tell me the product you're most proud of. The reason the design these questions is that the interviewer want to see in your answers whether you have product management experience before, whether after they hire you can hit the ground and running, and whether they can assign really important and big-scale tasks to you or not. So therefore, I recommend all of you guys, when you're getting ready for any product management interview, especially in such a competitive space like Google, you need to learn product management skills very solid ahead of time. Build a product portfolio and start to exercise and learn how would you use your own hands, own experience to build a product.