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Raw events are dumped cheaply to object storage, but the BI team needs fast SQL aggregations over th

A medium 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
medium

Interview Prompt

Raw events are dumped cheaply to object storage, but the BI team needs fast SQL aggregations over the cleaned data. Design storage that keeps raw data cheap AND gives BI a fast query surface.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your pipeline design solution with real code execution
  4. Get instant feedback and a hire/no-hire decision

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