Daily Spam Impression Rate
A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
An ad impression is considered spam if its campaign name contains 'spam'. Limit to users who also appear in page_views. For each day, compute the percentage of spam impressions among all qualifying impressions. Show the date and spam percentage.
Summary
How much of the ad feed is spam?
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