Ghosts in the Campaign
An easy 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
- easy
- Seniority
- L3
Interview Prompt
We run ad campaigns and log every impression, and we're reviewing the holiday campaign. For each of its impressions return the impression together with the matching user's details, keeping every impression even when no user record matches. Include all fields from both tables.
Summary
The holiday sale campaign. How did it do?
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