找群里的tt小伙伴推的ads 总体面试体验不错但case没问对问题理解有误就没答出来 .\n\n[hide=200]\n3道sql 关于bad content in tt， report 啥的 第一题要定义什么是top bad advertiser， 差不多只用了rank我记得\ncase是问已知there is a positive correlation between ad page visit and report on this ad (as a bad ad), how would you investigate and what's your hypothesis\n[/hide] \n