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The Repeat Offenders
A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- easy
- Seniority
- staff
Problem
Our data quality checker needs to flag repeated values in ingestion batches. Write a function called find_duplicates that takes a list and returns values appearing more than once - each duplicate listed only once, in order of first appearance.
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.