Campaign Conversion Window
A hard 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
- hard
- Seniority
- L5
Interview Prompt
Report each ad campaign's click-through rate and conversion rate from `ad_impressions` and `transactions`, next to the impression, click and converter counts behind them. The conversion rate is the share of a campaign's unique clickers who went on to buy, and only campaigns with at least 4 clicks belong in the report.
Summary
A narrow window between impression and action.
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