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Between Worlds

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
L4

Interview Prompt

We want the users whose sessions span more than one operating system. Return every session those users logged, with the user ID, OS name, device type, and session start.

Summary

iOS today, Android tomorrow.

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

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