The Shadow Cleaner
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
- L3
Interview Prompt
Our event exports have ID columns full of repeated values that need cleaning up. Given a list of `items`, return a new list that holds each value once. Do the cleanup yourself rather than with a one-call helper; keeping your own record of values already seen is fine.
Summary
Remove the repeats. No shortcuts.
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