Loading interview...

The Original Keeper

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
junior, mid

Interview Prompt

Our event stream sometimes delivers the same user ID multiple times, but downstream attribution models depend on the original arrival order. The pipeline needs to deduplicate without reshuffling. Given a list with possible duplicates, produce a clean version that keeps only the first occurrence of each value.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your python solution with real code execution
  4. Get instant feedback and a hire/no-hire decision