iOS Adoption by Age Bucket
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
- L4
Interview Prompt
Compare the count of iOS users (running iOS 16, 17, or 18) to total users in each age bucket, but only buckets where at least one session exists. Return results by total users, highest first.
Summary
The install numbers don't match the hype.
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