Sr Data Scientist Interview Questions

3,391 sr data scientist interview questions shared by candidates

I wasnt too prepared for the interview. I was asked questions on XGBoost, Logistic regression, some stat concepts, some drilling into NLP algorithms. Finally, there was a some drilling into web-visualization type questions using SVG etc. Overall, the questions werent super hard but I felt underprepared.
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Senior Data Scientist

Interviewed at Fidelity Investments

4.1
Aug 24, 2022

I wasnt too prepared for the interview. I was asked questions on XGBoost, Logistic regression, some stat concepts, some drilling into NLP algorithms. Finally, there was a some drilling into web-visualization type questions using SVG etc. Overall, the questions werent super hard but I felt underprepared.

Need to classify (images or texts) into 4 classes. If we only have 1000 labeled samples, how can we use an LLM to get millions of labeled samples? How to do clustering? How to determine whether the resulting clusters are good?
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Senior Data Scientist

Interviewed at Gong

4.4
May 25, 2026

Need to classify (images or texts) into 4 classes. If we only have 1000 labeled samples, how can we use an LLM to get millions of labeled samples? How to do clustering? How to determine whether the resulting clusters are good?

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