Between Worlds

An easy SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.

Domain
SQL
Difficulty
easy
Seniority
L4

Interview Prompt

The growth team's cross-device review wants the users whose sessions ran on more than one device type. 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 and run your SQL against a real database
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision