动手做Get your hands on it
练习跟着课文走 —— 每节课尾都有本课的练习。这一页是全部练习的总库，想集中刷题的时候来。 每个练习都写清了它来自哪一节，卡住了就回去看那一节。Practice follows the lessons — every lesson ends with the exercises for that lesson. This page is the whole library, for when you want to drill in one sitting. Each exercise names the lesson it came from, so you can go back when you stall.
已筛到你正在学的《Federation 考试》。想看全部就点上面的「全部」。Filtered to Federation exam — the course you are on. Use “All” above to see everything.
练习Exercises
筛出 2 个练习（共 148 个）。Showing 2 of 148.客户端发 { orders(userId:"123") { id shippingInfo { status } } }， 数据源里 user 123 有两个订单。把服务端的动作排序。
The client sends { orders(userId:"123") { id shippingInfo { status } } }, and in the data source user 123 has two orders. Put the server's steps in order.
拿到 node-subgraph，最合理的动作顺序？
You have just opened node-subgraph. What is the most sensible order to work in?