The interview included a case study focused on a specific operational challenge at DoorDash. I was asked to analyze the problem, identify key drivers, and provide actionable insights.
Data Scientist Senior Interview Questions
3,397 data scientist senior interview questions shared by candidates
Tech screen was 4 moderately complex SQL queries (30 min) and a product feature case study (30 min)
Business: How would you approach reducing order cancellations?
SQL: Write query to find order cancellation rate by day
increase delivery range how to determine the minimum detectable effect? urban vs rural? if the math tells us 2 days sample size is enough, will you only run experiment for 2 days?
4 SQL questions + Product Case Study
Can you describe what a random forest is? What is the difference between ridge and lasso regression?
CNN , weight sharing between kernels
What is p-value ?
Grouping tables using SQL.
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