Q: If there are 10 million variables, how can you reduce the dimensions?
Senior Data Scientist Interview Questions
3,387 senior data scientist interview questions shared by candidates
how would you go about imputing data
A project you worked on, feature selection, over-fitting of the model. What do you do when the features are correlated. What is the main difference between the F1 score and ROC-AUC? How do you decide between different models? What does MLE correspond to in Logistic Regression?
Why do you want to join Optum?
Showed Python code and asked to explain what it did, or correct errors
Answer the boy-girl problem.
Describe one common problem when training deep neural networks.
Give examples of time series prediction algorithms,
How to grade a perfection of drawn circle?
If you could have one superpower, what would it be?
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