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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
mid

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.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision