Google Data Scientist Interview Experience — Rejected After the Role Related Knowledge Round on Experimental Design

Google·Data Scientist·Sep 2026
Technical ScreenRejectedmedium

Not long after I finished the hiring assessment, the recruiter reached out. There was no phone call; the email just laid out the format of the interviews.

The first round was Role Related Knowledge, and they didn't give particularly detailed information about it.

First round interview. The interviewer was someone from the team, probably the hiring manager. After a self-introduction and a brief walk through my background, it was basically all cases.

The JD for this team says the work involves LLMs, so I thought there would be a lot of LLM eval, but it still felt mostly focused on experimentation. The brief feedback I got also said I failed on experimental design.

Interestingly, in question 2 I first thought they were only asking how to design an experiment, but then the interviewer followed up asking whether I could test two models in parallel, so I also brought up things like shadow deployment and canary (because I had seen in some other interview write-ups that BDS sometimes tests a bit of system design).

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Curated and edited by PracHub

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Interview at a glance

Company
Google
Role
Data Scientist
Rounds
Technical Screen
Outcome
Rejected
Difficulty
medium
Interview date
Sep 2026
Questions from this interview
1 question

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