电面分两部分，和hr发的guide略有不同，没有直接问case，非常偏product\n\n\nSQL比较简单，原题是\n\n\ntrips table\nuser_id | trip_id | city_id | trip_start_timestamp_utc | trip_status | fare\n\n.google и\nusers table . .и\nuser_id | user_type | is_active\n. 1point 3 acres\n\ncity table\ncity_id | city_name | timezone\n\n.--\n1) How many active riders and drivers do we have on the platform\n2) Which driver has the highest earnings so far this year?\n每个问题用了两三种方式写\n\n. ----\nStat有点不按常规，就围绕了两个问题讨论，分别举了例子-baidu 1point3acres\n\n\n1) What are the assumptions of A/B testing?\n2) What is the difference between type I and type II error? Which is worse?\n.\n\n这里的takeaway可能是准备ds的stat面试还是要结合情景，能解释清楚最重要