Accounted For
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
Our per-campaign attribution numbers look too good, and we suspect many ad impressions can't be tied back to a real account at all. For each campaign, find the percentage of its impressions that belong to a known user account, 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 and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision