Proof of Presence
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
The security team is measuring how reliably users complete two-factor authentication, counting only the pushes that were actually delivered. For each client platform, find the confirmation rate: the share of delivered pushes the user opened.
Summary
Two-factor sent. How many confirmed?
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