group video call那道题，面试官很多follow up questions\n\n\nSQL:\nQ1:\nIdentify user who initiated video calls in the last 7 days?\n复制代码\nQ2:\nWhat % of daily active users from France were on a video call yesterday?\n复制代码\n\n\n以下内容需要积分高于 188 您已经可以浏览\n\nProduct\n根据上面的两个table你能做出什么分析：面试官给的提示是analyze relationship between users\nask recipient to understand if they really need a group call. 这里我clarify了是不是conduct survey，面试官说不是，是你去provide data engineer a wishlist what kind of log you wish them to provide\n你会选哪个platform in Meta作为这个feature的proxy product？\n要不要设置一个group call的人数limit？\n怎么设计experiment\n解释network effect\n如果你的design还是有一定程度的contamination，比如你的朋友没在这个feature里，你想打电话给他，是拒绝还是接受\n