Tables With Many DQ Failures

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
L3

Interview Prompt

Find the tables piling up failed data quality checks since April 1, 2026, with each table's failure count, worst offenders first. The data platform team is pulling this from dq_checks, which logs one row per check run along with whether it passed.

Summary

Some tables have never once passed QA.

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