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      Data Scientist Interview

      Jun 12, 2026
      Anonymous Interview Candidate
      Boston, MA
      No offer
      Positive experience
      Difficult interview

      Application

      I applied online. I interviewed at Onward Search (Boston, MA) in Jun 2026

      Interview

      I applied online by myself. I found this position from Jobright (job search tool). The JD said the team was looking for data scientist for a healthcare org. As soon as I submitted my application, I received an invitation to complete a video interview with Alex (AI interview) in 24 hr. One human recruiter reached out to me and asked about my visa status. I was nervous about the AI interview and wasn't sure what to expect. Some people said pasting the JD to ChatGPT could help prepare most of the questions. I did the same but that wasn't helpful enough for my case. Alex asked in-depth questions about technical skills like SQL window function, R library, modeling train/test set, and A/B testing success metrics. You should really know your project and memorize the detail. Overall, the AI interview acted with patient, attentive, professional manner as it took in all the project detail I described.

      Interview questions [1]

      Question 1

      Q: Tell me about a complicated SQL query you wrote? How did you optimize the join query? Did you use window function or indexing method? Q: What library did you use for coding in R or Python? Walk me through how did you use that library to perform analysis? Q: Tell me about your ML model project? How did you decide training and test set? Q: Explain A/B testing for me in simple words? Aside from the metric your mentioned, what other success metrics did you track to evaluate the experiment? Q. Tell me about a time you communicated with non-technical audience? What follow-up questions did they raise and how did you answer them?
      Answer question