Loading interview...

Daily Cross-Platform Users

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
junior

Interview Prompt

The growth team is tracking daily cross-platform engagement for mobile and web users. For each date, count the unique users who had at least one session on a 'mobile' or 'web' device. Show the date and the user count, chronologically.

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