Device Mix
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
- L3
Interview Prompt
The product team is scoping a redesign of the web experience, so it only cares about devices that actually run a browser. For each pairing of device type and operating system, report how many such devices are registered, leaving out the pairings too rare to matter.
Summary
The device breakdown before the redesign.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision