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Data Scientist Senior Interview Questions
3,397 data scientist senior interview questions shared by candidates
- what is collinearity? what is the difference between bagging and boosting?
Give a few recent examples of recent completed projects you proud about, explain challenges and how you dealt with them.
which algorithms do you know for classification?
how do you decide which algorithm to use?
when was the last project you used supervised learning and to describe it
How to evaluate AB test result How to determine how much traffic for AB test If CEO not ask for AB but full roll out, how to compare metrics before and after
One of the questions at the panel interview focused on how to handle high-cardinality categorical variables in a model, especially when a naive approach could introduce noise or performance issues. The discussion was very practical and centered on trade-offs rather than theoretical tricks.
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