The Price of a Tap
A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
Marketing has been running promotional push campaigns whose names all contain 'promo', and wants to know how hard each one worked to earn a customer. For every promo campaign, broken out by year, find how many notifications it took to earn a single open: total notifications sent divided by the number that were opened.
Summary
The campaign fired thousands of pushes. Find what each open really cost.
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