DataDriven
LearnPracticeInterviewDiscussDailyJobs

Multi-Month Active Users

A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
SQL
Difficulty
hard
Seniority
L4

Interview Prompt

Identify users who logged sessions in at least 3 separate calendar months, based on session_start dates from user_sessions. Return the user ID.

Summary

Active this month and last month. Who stuck around?

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