3/1才交申请,3/9推荐人才把推荐信交了,3/12收到面试邀请。(感觉学校效率好高啊) 3/22早上10am面试David Uminsky。
工作了几年(非tech),学校的东西早就忘了。虽然复习了两天还有大神带着过,但是对统计、线代、python的理解只停留表面以至于追问都答不上来。
还是很感谢cd上的童鞋们分享的面经,面试的问题基本都中。回馈大家分享一下面试题:
Stats:
- A, B independent events, what's the prob (A|B)
- box and whisker plot
- 95% interval
- A study shows that tutoring hours and grade are negatively correlated, can we say that tutoring harms students’ academic performance?
Linear Algebra:
- Given 5 3-dimensional vectors, can you explain what does linear dependent mean?
- Intuitively what can you tell by looking at the 5 vectors? (David: they are dependent because 3 dimension vectors have only 3 directions, 5 vectors must mean there are two redundant)
- Given a matrix A, explain what is Eigenvector and Eigenvalue?
- If A is invertible, what can we tell about eigenvalue? (David: eigenvalue is not zero)
Python: (share screen, read code what does the code return)
- return average
- return index of the maximum
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