夏天来到，金毛变拉布拉多有没有可能？# pets - 心有所宠
h*y
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【 以下文字转载自 DataSciences 讨论区 】
发信人: heyley (heyley), 信区: DataSciences
标 题: 新出炉的FB面经
发信站: BBS 未名空间站 (Tue Jan 6 20:18:22 2015, 美东)
已挂。感觉跟预想的非常不一样。概率、统计的根本没问。因为面试官开始连不上网，
所以直接考business sense的题，之后进行到数据分析时时间已经不太够了。
1. business sense:
There are two types of cars A and B. The number of people in US who use A
and B are the same. They drive the same distances each month.
Now there are two new technologies, X and Y (of equal cost).
If apply X, mpg of A would increase from 50 mpg to 75 mpg;
If apply Y, mpg of B would increase from 10 mpg to 11 mpg.
The goal is to decrease the dependence on foreign oil, or to decrease the
consumption of gasoline.
Question: which technology would you apply?
Follow up question: after applying the technology of your choice, assume
there's money available for research on new technology, which car would you
choose to conduct research on?
2. data question:
dialoglog
(userid int
appid int
type char , a flag either "imp" or "click"
ds timestamp
)
How would you access the quality of app?
How to compute click-through rate (in mySQL)?
还是SQL不太熟练。跟对方交流起来没什么问题，但感觉思路跟面试官对不上。
先去角落里默默悲伤一阵。。。
发信人: heyley (heyley), 信区: DataSciences
标 题: 新出炉的FB面经
发信站: BBS 未名空间站 (Tue Jan 6 20:18:22 2015, 美东)
已挂。感觉跟预想的非常不一样。概率、统计的根本没问。因为面试官开始连不上网，
所以直接考business sense的题，之后进行到数据分析时时间已经不太够了。
1. business sense:
There are two types of cars A and B. The number of people in US who use A
and B are the same. They drive the same distances each month.
Now there are two new technologies, X and Y (of equal cost).
If apply X, mpg of A would increase from 50 mpg to 75 mpg;
If apply Y, mpg of B would increase from 10 mpg to 11 mpg.
The goal is to decrease the dependence on foreign oil, or to decrease the
consumption of gasoline.
Question: which technology would you apply?
Follow up question: after applying the technology of your choice, assume
there's money available for research on new technology, which car would you
choose to conduct research on?
2. data question:
dialoglog
(userid int
appid int
type char , a flag either "imp" or "click"
ds timestamp
)
How would you access the quality of app?
How to compute click-through rate (in mySQL)?
还是SQL不太熟练。跟对方交流起来没什么问题，但感觉思路跟面试官对不上。
先去角落里默默悲伤一阵。。。
