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A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
The analytics team wants to know which mobile operating system keeps people in the app longest. Return the single OS with the highest average session duration, along with that average.
Summary
Attention is the scarcest resource. Find the platform that holds it longest.
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