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Session Overview

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

Product wants a full engagement picture that still includes inactive accounts. For every user, count their sessions and find their longest session_duration_sec, keeping users with no sessions in the output. Return the username, session count, and max duration.

Summary

Full engagement picture, even for the ones who never showed up.

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

Related

  • All Mock Interviews
  • Practice Mode (untimed)
  • SQL Interview Questions
  • Data Engineering Interview Prep Guide
  • Practice Problems
  • Daily Challenge