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Top Identified Event Types

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

Find the top 3 event types by total records, but only those where identified (non-null user_id) events outnumber anonymous (null user_id) events. Rank by total events, most frequent first. Return the event type and total event count.

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