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This is a medium difficulty Machine Learning question, commonly asked during Technical Screen rounds at OpenAI.

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This question is commonly asked for Machine Learning Engineer candidates at OpenAI during technical interviews.

Implement 1NN with NumPy

Last updated: Jun 21, 2026

Quick Overview

This question evaluates implementing a 1-nearest-neighbor classifier with NumPy, testing skills in vectorized numerical computation, distance metrics, tie-breaking label handling, and translating algorithms into linear-algebra operations.

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OpenAI
Machine Learning
Machine Learning Engineer

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Implement 1NN with NumPy

OpenAI

May 19, 2026, 12:00 AM

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