Attributable Impression Rate
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 measuring data completeness in the ad pipeline. What percentage of all ad impressions can be tied back to a known user account? Impressions whose user cannot be found in the user records should still count toward the total but not as attributable. Return a single percentage.
Summary
What share of ad impressions can be traced to a real user account
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