Who Came First
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
- mid
Interview Prompt
An upstream feed hands you member IDs in the exact order they were scanned during a shift, and the same member often gets scanned several times. Collapse the feed so each member appears once, in the position it was first seen.
Summary
The feed repeats itself. Keep each member only the first time it speaks.
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