Standard technical questions about sql, r, python
Sr Data Scientist Interview Questions
3,513 sr data scientist interview questions shared by candidates
Round 1: Recruiter call - Assess fit. Asked very simple SQL questions e.g. group by Round 2: hiring manager round + 90 mins SQL interview right after. - Review past experience. SQL interview is on HackerRank Round 3: 60 mins technical/ case study interview - Asked about metrics to use in evaluating performance - Marketplace metrics Round 4: final interview with director of Strategy and insights - Reviewed past experience - quite casual chat on org, some competency-based questions
Why change job, what are the expectations
Mostly questions were about Bayesian Statistics and Probabilities.
Take-home assessment was mainly data manipulation.
Case study Stakeholder requirements SQL manipulation (case when)
Tell me about your work experience?
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
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