Data Scientist Interview Guide 2026
Data Scientist loops test Python, SQL and Feature Engineering first, then Problem Solving and Machine Learning. Everything below is aggregated from 19,542 candidate reports and 2,391 company guides.
Topics by share of guides
Recurring stages, by frequency
- 1Recruiter or HR screenBackground, motivation, target level and timeline.82%
- 2Technical screenA short live technical round before the main loop.12%
- 3Assessment or take-homeOnline test, case study or take-home exercise.58%
- 4Technical interviewsDeep dives on the core skills the role tests.54%
- 5Hiring manager interviewRole fit, past work and how you would operate on the team.12%
- 6Panel or team interviewsSeveral interviewers at once, often cross-functional.23%
- 7Behavioral and culture fitPast situations, collaboration and values.27%
- 8Final or onsite roundA multi-interview loop, sometimes with leadership.37%
Popular Data Scientist interview guides
Most common Data Scientist questions
Questions by category
- Machine Learning8,748
- Behavioral & Leadership7,772
- SQL & Data Manipulation5,850
- Statistics & Probability4,557
- Product Sense3,600
- Metrics2,629
- A/B Testing & Experimentation2,389
- Pipelines1,909
What candidates reported recently
My interview process felt unusually intense and a bit chaotic from the start. After an initial technical screening phase, I had a supply chain-focused technical round with multiple interviewers at once, including SQL, Python, statistics (one of the questions was probability), and then deeper discussion of machine learn
After I applied online, I heard back from HR within about a week. The first round was a 30-minute behavioral and background interview focused on my experience and fit. Shortly after, I did a one-hour technical screening with a team member where the questions split between SQL and Python, and it felt pretty structured a
My process began with an HR-style call where they talked through the role, compensation/benefits, and how the overall hiring flow worked. After that, I had a technical screen that moved fast. The first part was a SQL round using a Hackerrank-style format with four medium questions—there was barely enough time for the l
After an initial recruiter screen, I was told the next step would be a fairly straightforward conversation with the hiring manager with just one technical question at the end. That’s not how it played out at all for me: the hiring-manager discussion turned into a rapid sequence of introductions followed by a deep dive
After a recruiter screen that felt straightforward, I was told the next step would be a relatively short conversation with the hiring manager—about forty-five minutes—with just one technical question at the end about A/B testing. That didn’t match how it played out. The hiring manager interview quickly turned into most