The Consecutive Streak
A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
Given a list of activity records (dicts with 'user_id' and 'date' in 'YYYY-MM-DD' format) and an integer min_streak (default 3), find users who have min_streak or more consecutive calendar days of activity. Deduplicate duplicate dates per user. Return the sorted list of qualifying user_ids.
Summary
Login streaks. No gaps allowed.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision