User Devices
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
- L3
Interview Prompt
The personalization team wants to know which platforms each user actually engages on. For every user with at least one session, show the distinct device types they've used alongside their username.
Summary
Desktop, mobile, tablet. What does each user actually use?
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