Every Voice That Answered

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

In our chat data, some messages are replies to a piece of content. For each piece of content, count how many unique reporters replied to it, and return the content ID alongside that count.

Summary

Replies pile up fast. Find out how many distinct voices actually spoke to each piece.

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