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Sr Data Scientist Interview Questions
3,380 sr data scientist interview questions shared by candidates
1. easy-medium SQL queries 2. easy-medium Python, Pandas 3. medium ML questions 4. questions about design A/B tests - advanced 5. plus questions about professional experience
What is random forest? How would you remove duplicates in python? What packages in python do you use? How do you deal with null values? How do you combine data? How do you join data?
1st round was technical interview on Coderpad 1. 3 SQL tables related to cvs health/ aetna members. 2. Python questions - Got stuck in converting data to appropriate datetime format. 3. Basic machine learning algo questions on - How to fix imbalanced data - What is Random forest - Difference between bagging and boosting - How to fix overfitting
I took the online assessment. It had two parts. First part was SQL questions and Second part was python data science part. Only MySQL was available and asked five different questions to get expected output using product related tables. In Python part, there were 2 questions. One was about cleaning up the table and another question was about apply machine learning model.
Previous projects and sql. Interviewer was less experienced person who brought incorrect sql tables. Customer table had payment id as primary key instead of customer id lolz.”
Explain lstm rnn adv and dissdv llm finetuning
SQL (join, group by window function) , Python (data manipulation), Statistics (A/B testing experiences)
Difference between random forest and decision tree
Algorithms, Python, SQL, basic ML question
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