Sr Data Scientist Interview Questions

3,513 sr data scientist interview questions shared by candidates

General interview questions regarding how the Classification metrics like F1, AUC etc can be enhanced by giving a small case study with dataset and baseline confusion metrics. Binary and Multi Class Classification algorithms and a few questions regarding the gradient descent algo training times from problem statement to statement
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Senior Data Scientist

Interviewed at Fidelity Investments

4.1
Aug 21, 2025

General interview questions regarding how the Classification metrics like F1, AUC etc can be enhanced by giving a small case study with dataset and baseline confusion metrics. Binary and Multi Class Classification algorithms and a few questions regarding the gradient descent algo training times from problem statement to statement

ML and coding questions. Shallow and basic ML questions. Coding questions were easy, except for one which was very hard (difficulty level was Expert in geeeksforgeeks) and the interviewer didn't make any efforts to explain it properly.
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Senior Data Scientist

Interviewed at Walmart Global Tech

3.6
May 3, 2021

ML and coding questions. Shallow and basic ML questions. Coding questions were easy, except for one which was very hard (difficulty level was Expert in geeeksforgeeks) and the interviewer didn't make any efforts to explain it properly.

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.

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