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

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This question is commonly asked for Data Scientist candidates at OpenAI during technical interviews.

Implement NumPy neural-network layers

Last updated: Apr 23, 2026

Quick Overview

This question evaluates competency in implementing neural-network layers and array algebra in NumPy, including matrix multiplication, broadcasting rules, activation functions, shape reasoning, numerical stability (e.g., softmax stability), and practical debugging of common ML implementation bugs.

medium
OpenAI
Machine Learning
Data Scientist

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Implement NumPy neural-network layers

OpenAI

Feb 18, 2026, 12:00 AM

mediumData ScientistOnsiteMachine Learning

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