Loading interview...

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
junior, mid

Interview Prompt

A pairing service counts how many equal-value pairs can be formed from a pool of submitted items for batch matching. Write a function that takes a list of integers and returns the number of pairs of indices (i, j) where i < j and nums[i] equals nums[j].

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