One Step Behind
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
- L3
Interview Prompt
You're aligning a stream of sensor readings so each one can sit beside the reading that came just before it. Return a list the same length as the input, where each slot carries its predecessor's value.
Summary
What came before this row?
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