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The Bit Counter

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

A hardware diagnostics tool needs to count how many bits are set to 1 in the binary representation of an integer. Given a non-negative integer n, return the count of 1-bits (also known as the Hamming weight) without converting to a binary string.

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