The One-Way Street
A easy Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
You're profiling a numeric column pulled from a metrics export, hunting for the longest stretch where the readings only ever move one way. Given `arr`, return the length of the longest contiguous run that stays entirely non-decreasing or entirely non-increasing.
Summary
The longest stretch that never turns around.
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