Twitter Data Scientist Interview Questions | Glassdoor
Twitter Interviews
Interviews
  • Jobs
  • Companies
  • Salaries
  • Interviews
    Glassdoor Logo

    Find jobs for Data Scientist

    Twitter Data Scientist Interview Questions

    Updated Mar 4, 2018
    19 Interview Reviews

    Experience

    Experience
    26%
    37%
    37%

    Getting an Interview

    Getting an Interview
    58%
    21%
    16%
    5

    Difficulty

    3.4
    Average

    Difficulty

    Hard
    Average
    Easy

    Interviews for Top Jobs at Twitter

    More

    19 Candidate Interview ReviewsBack to all Interviews

    Filter

    Sort: PopularDateDifficulty

    Filter

    Sort: PopularDateDifficulty

    Helpful (3)  

    Data Scientist Interview

    Anonymous Interview Candidate
    No Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through an employee referral. The process took 6 weeks. I interviewed at Twitter.

    Interview

    I got contacted by a recruiter and had 4 interview rounds. 1 phone screen, 2 video technical interview (ML Theory + Coding in SQL/Python/R, you decide the language), then an on-site interview round with 5 interviews of 45 minutes each (2 interviews with Data Scientists, lunch with another Data Scientist, an interview with a project manager and an interview with the Data Science Manager).

    Everyone was very kind and very ethusiastic about their job, asked interesting and challenging questions and seemed very smart and capable.

    As the Data Science position was for the product department, I had to face a lot of experimentation questions (A/B tests, metrics development...) instead of machine learning algorithms, which I imagine would be required for the Forecast and Modelling area, for example.

    Interview Questions

    • What would you change in Twitter app?
      How would you test if the proposed change is effective or not?   Answer Question

    Other Interview Reviews for Twitter

    1.  

      Data Scientist Interview

      Anonymous Employee
      Accepted Offer
      Positive Experience
      Average Interview

      Application

      I applied through a recruiter. The process took 3 weeks. I interviewed at Twitter in February 2018.

      Interview

      Two video interviews and a coding test, then three video interviews. Five of the six interviews were technical. All of the interviewers were knowledgeable and friendly, but they changed the schedule on the fly a lot and the different interviewers didn't seem to know what I'd already been asked/where I was in the process.

      Interview Questions

      • Some basic SQL questions and some intermediate algorithms questions, along with a lot of verbal data science questions in the interviews.   Answer Question

    2.  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Neutral Experience
      Difficult Interview

      Application

      I applied online. The process took 3 weeks. I interviewed at Twitter in November 2017.

      Interview

      3 weeks after I applied, I received a link to a coding challenge. This link is set automatically so you don't have anyone to talk to in case you have questions. You have one week to complete the challenge but it's supposed to be done in 90 minutes if you want to get through.

      Interview Questions

      • Three exercises. One involving SQL, another one involving dynamic programming and one last involving tries.   1 Answer
      3. Join the Twitter team
      See Our Latest Jobs

    3.  

      Data Scientist Interview

      Anonymous Interview Candidate in Boston, MA
      No Offer
      Negative Experience
      Average Interview

      Application

      I applied online. The process took 4+ weeks. I interviewed at Twitter (Boston, MA) in September 2017.

      Interview

      I applied online. The process took about a month. 2 phone interviews with HR managers, test and personal interview with team members (It took about 3 hours). Free lunch was served and people were friendly.

      Interview Questions

    4.  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Negative Experience
      Difficult Interview

      Application

      I applied online. The process took a week. I interviewed at Twitter.

      Interview

      HR set me up with technical interview, no HR screening. The interview was very bad, the guy was super inexperienced. I had really hard time understanding his question, and the coding part is even worse. I was interrupted every 1 min, couldn't code at all as this person interrupted me with something when I started write the code. Also he doesn't know the language I was coding.

      Interview Questions

    5. Helpful (1)  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Negative Experience
      Average Interview

      Application

      I applied through a recruiter. The process took 1+ week. I interviewed at Twitter in September 2016.

      Interview

      I was supposed to have a 45 minute technical coding screen but the guy was booked too tightly and only had 20 minutes (told me this at the beginning of the call). So instead of a technical coding screen it turned into a series of random business case style interview questions. Overall a pretty terrible - no wonder Twitter is plummeting as a company

      Interview Questions

    6. Helpful (3)  

      Data Scientist Interview

      Anonymous Interview Candidate in San Francisco, CA
      No Offer
      Neutral Experience
      Average Interview

      Application

      I applied online. The process took a week. I interviewed at Twitter (San Francisco, CA) in June 2016.

      Interview

      I was contacted fairly quickly after applying online. I didn't find any of the interview questions very hard. What struck me was the type of questions: how-do-you-solve/do-xyz, where xyz is specific. Nowadays it seems any job involves data analysis is called data scientist. As a statistician, my job search 95% of the time led me to data scientist position postings. In the pre-data-science period, statistician interviewers were composed of at least half internal data customers from various domains. They wanted to know how I can help them achieve their research or business goals with data. In contrast, all of my data scientist interviewers (not just at Twitter) were younger and more computing savvy data analysts from quantitative background. They wanted to know if I know how to do xyz, where xyz is something they themselves have encountered. This difference is important for candidate and employers of data scientist.

      Interview Questions

      • What features would you use to build recommendation algorithm for users.   1 Answer

    7. Helpful (1)  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Positive Experience
      Average Interview

      Application

      I applied online. The process took 2 weeks. I interviewed at Twitter in April 2016.

      Interview

      The recruiter contacted me to do a phone interview. It is all about technical questions and programming skills. The whole process is doing a study case of the Hypothesis test. The Hypothesis is like "Following" your followers back increases the number of "likes" you receive on your tweets

      Interview Questions

    8. Helpful (3)  

      Data Scientist Interview

      Anonymous Interview Candidate in San Francisco, CA
      No Offer
      Positive Experience
      Difficult Interview

      Application

      I applied online. The process took 6 weeks. I interviewed at Twitter (San Francisco, CA) in February 2016.

      Interview

      I applied in Twitter by forwarding my resume to a HR whom I met in a conference. Since, I live in India and I applied for Twitter, San Francisco, the whole process took close to 2 months. There were total 10 rounds of interviews.

      The first round was with Product Manager which was more like a exploratory round. He mainly asked domain specific question to see whether I would be a good fit in his team.
      The next three rounds were conducted in a span of three weeks. The questions were mainly related to Machine Learning, Statistics with focus on experimentation, Algorithms.

      After 4 rounds, the team decided to conduct remaining interviews on-site, but due to visa issues I had to give remaining 6 interviews online on a single day. The questions were mainly based on Algorithms ( 4 rounds ), Machine Learning and Statistics.

      Reason for rejection : Coding rounds did not went well.

      Interview Questions

    9. Helpful (5)  

      Data Scientist Interview

      Anonymous Interview Candidate in San Francisco, CA
      No Offer
      Neutral Experience
      Difficult Interview

      Application

      I applied through an employee referral. The process took 3 weeks. I interviewed at Twitter (San Francisco, CA) in September 2015.

      Interview

      phone interview with hiring manager, got onsite invitation the same day
      onsite, meet with 6 engineers. one's data scientist, all others are software engineer.
      algorithm question mostly, some machine learning question, math/application case.
      also, one system design question. how large scale machine learning work on distributed system

      positive feedback, went through hiring committee. However, no offer yet. They're cutting jobs, so bad timing!

      Interview Questions

      • algorithm(50%), machine learning(30%), system design(20%)   Answer Question
    Don't Miss Out On a Job You Love
    Upload a resume to easily apply to jobs from anywhere. It's simple to set up.