Two Sigma Data Scientist Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 15 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Two Sigma.
Two Sigma
Data Scientist
Entry Easy Negative experience No offer 3 rounds
Interview process
Recruiter call Take home Technical screen
Interview formats
Coding Technical Behavioral
I had a call with HR, then did a simple HackerRank coding assessment which involved OLS regression and data analysis. After that, I had a technical phone screen. It was pretty straightforward, mostly asking me to walk through my current project with some follow-up questions. Unfortunately, my interviewer's second language was English, making communication difficult. While diversity is important, companies should consider this when recruiting.
Confirmed questions2 questions
- Can you describe your approach to the sample project I pitched?
- What would someone close to you say are your weaknesses?
Two Sigma
Data Scientist
Mid Difficult Positive experience No offer 7 rounds
Interview process
Technical screen Recruiter call Onsite Onsite Background check
Interview formats
Coding Technical Behavioral Case Presentation Technical
Started with a HackerRank for algorithms. Then a phone interview covering background, some easier algos, and probability/stats. Next was an onsite in London with 4 one-hour interviews: 2 focused on software development and maths, and 2 on data science (identifying hypotheses in data, not the other way around) plus maths/teasers and some surprises. Finally, an interview process in NY with 7 interviews: 2 on algorithms, 1 on maths/brainteasers, 1 on data sources, 2 on motivations and business ideas, and 1 HR interview. Generally, London focused more on data science and modeling, while NY looked for engineering and ideas.
Confirmed questions1 question
- Do you agree to the non-disclosure agreement?
Two Sigma
Data Scientist
Entry Difficult Positive experience No offer 5 rounds
Interview process
Technical screen Recruiter call Technical screen Background check Technical screen
Interview formats
Coding Behavioral Technical
Had a Hackerrank OA test screen with 2 questions + 1 bonus question. Then, a hiring manager conversation about the role and my resume. After that, a Live Coding round, unfortunately I was rejected here, focusing on Data Structures in Python. Then a Behavioral interview and finally an ML/Stats interview. All interviews were virtual.
Confirmed questions5 questions
- A HackerRank OA with a LeetCode medium/hard question, mostly on math and data structures.
- Another HackerRank OA question on regression.
- A bonus follow-up question on regression for the HackerRank OA.
Two Sigma Data Scientist Interview Questions
Quoted word for word from Two Sigma interview reports.
“How would duplicating data affect R2?”
Read reports →“Describe a time series model.”
Read reports →“Could you explain OLS regression?”
Read reports →“For a case study, how would you make sure a house price is reasonable?”
Read reports →“What's your approach to determining a reasonable house price?”
Read report →“Can you explain a sorting algorithm?”
Read report →“Could you generate a random variable and address a database problem?”
Read report →“Can you solve this second practical data analysis problem?”
Read report →“Do you agree to the non-disclosure agreement?”
Read report →Formats, difficulty and experience
Across all 15 Two Sigma interview reports.