Funnel Leakage Report
A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
The conversion optimization team tracks a four-step purchase funnel: page_view, add_to_cart, checkout_start, and purchase. For each step, show how many unique users reached it and the drop-off percentage from the previous step. Break the analysis down by tag.
Summary
Users enter the funnel. Most never reach the bottom.
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