Devices Per 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

For active users in the 25-34 age bucket, the product team wants to know which device types they use most. Count the number of unique devices broken down by device type, from most to fewest.

Summary

Device diversity among the younger users.

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