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The Shadow Cleaner
A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- easy
- Seniority
- junior
Problem
Our data quality layer removes duplicates from record streams. Write a function called dedup that takes a list and returns a new list with duplicates removed, preserving the first occurrence order. Do not use set(), dict.fromkeys(), or any similar built-in dedup shortcut.
Practice This Problem
Solve this Python problem with real code execution. DataDriven runs your Python code in a sandboxed Docker environment and grades it instantly.