Applied Scientist Interview Questions

1,174 applied scientist interview questions shared by candidates

Q: Talk about GMM/HMM, PCA and other dimensional reduction method, how K-means work and what happens if different features are of different dynamical range, how does GMM estimation work (EM algorithm) Q: Write a function that takes an array of size N, with randomly sorted numbers and a number K as input and output an array of size K with the largest K numbers?
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Applied Scientist

Interviewed at Amazon

3.5
Mar 9, 2016

Q: Talk about GMM/HMM, PCA and other dimensional reduction method, how K-means work and what happens if different features are of different dynamical range, how does GMM estimation work (EM algorithm) Q: Write a function that takes an array of size N, with randomly sorted numbers and a number K as input and output an array of size K with the largest K numbers?

how do you choose the best model among all possible models? explain neural network assumptions of linear regression model if you have large number of predictors how to you handle them?? what if you have large number of positive observation vs few number of negative observations?
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Applied Scientist

Interviewed at Amazon

3.5
Nov 10, 2016

how do you choose the best model among all possible models? explain neural network assumptions of linear regression model if you have large number of predictors how to you handle them?? what if you have large number of positive observation vs few number of negative observations?

The first interviewer asked very general questions. Gave me a general classification problem and asked questions. The tricky question was about a class with low prior. The second interviewer asked coding questions. Like traversing a tree. He also asked a question about computer precision.
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Applied Scientist

Interviewed at Amazon

3.5
Nov 21, 2016

The first interviewer asked very general questions. Gave me a general classification problem and asked questions. The tricky question was about a class with low prior. The second interviewer asked coding questions. Like traversing a tree. He also asked a question about computer precision.

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