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The Pair 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
L3

Interview Prompt

Given a list of integers, return the number of index pairs (i, j) with i < j and nums[i] == nums[j].

Summary

How many pairs can be formed from the crowd?

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

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