The Patients We Cannot Move
A hard Pipeline Design mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Pipeline Design
- Difficulty
- hard
- Seniority
- L6
Interview Prompt
We run federated machine learning across hospital networks for clinical trial research. Each hospital has patient data we're not allowed to move - privacy law and patient consent don't permit central aggregation. We need to train models and compute population statistics across data that is physically distributed across 40 hospitals in 8 countries, each with different EHR systems and data formats. Design a data pipeline that makes this possible.
Summary
Patient data stays local. Insights have to be global.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your pipeline design solution with real code execution
- Get instant feedback and a hire/no-hire decision