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Running Distinct Count
A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- medium
Interview Prompt
An approximation pipeline tracks how many distinct values have been seen at each point in a stream. Return a list where each element is the count of distinct values seen from the start of the list up to and including that index.
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