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The One-Timers

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

Our feature store deduplication step needs to identify singleton values. Write a function called unique_values that takes a dictionary and returns a sorted list of values that occur exactly once across all entries.

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