Accounted For
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
The attribution team is auditing the ad log campaign by campaign, where an impression counts as traceable only when it maps to a known user account. For each campaign, find the percentage of its impressions that are traceable, most traceable first.
Summary
Every impression is a face in the crowd; some we can name, the rest are strangers. Measure the gap, campaign by campaign.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision