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A medium SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.

Domain
SQL
Difficulty
medium
Seniority
L4

Interview Prompt

Each row of `chat_msgs` is one message, and its `reply_to` is filled when it answers an earlier message. Build a reply leaderboard: each user's standing, user ID and reply count, most replies first.

Summary

The loudest voices on the platform.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write and run your SQL against a real database
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision