The Gap Filler
An easy Python mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- Python
- Difficulty
- easy
- Seniority
- L4
Interview Prompt
A sensor feed arrives as `values`, with dropped readings recorded as `None`. Return a list of the same length where each gap is filled with the most recent reading that came before it.
Summary
Fill the Nones with the last real value.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your Python against test cases
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision