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Twice Over

A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
SQL
Difficulty
medium
Seniority
L3

Interview Prompt

Every training run our ML platform kicks off lands as a row in ml_models, and some models get retrained far more than others. Ignoring the runs that failed outright, find the models that have been retrained heavily, along with how many runs each one racked up.

Summary

Same model, trained twice.

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 sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision

Related

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