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Feature Flag Fan vs Detractor Pairs

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

Domain
SQL
Difficulty
hard
Seniority
senior

Interview Prompt

Rank enabled users by rollout percentage descending, and disabled users by rollout ascending. Pair the #1 fan with the #1 detractor, #2 with #2, and so on. Break ties by flag ID ascending, and show both user IDs.

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