#code reading

5 code reading interview questions, asked at Apple, OpenAI, Scale AI. Last asked Sep 2026.

Write a usage example for an unfamiliar C++ classCodingInstead of an algorithm, you get a short C++ class you have never seen that owns a resource. Write a small program that shows how the class is meant to be used, then explain what…
Last asked Sep 2026
Walk through an agent evaluation codebase for PDFsCodingYou are shown a codebase that evaluates an agent working over PDF documents. Walk the interviewer through it: how the pieces fit together, how the evaluation runs and is scored…
Last asked Jul 2026
Read and refactor a large PyTorch training fileCodingYou get a few hundred lines of existing PyTorch code that trains a classifier. Answer questions about its time and memory cost, then make a series of changes to it in parts…
Last asked Mar 2026
Debug a project-assignment codebaseCodingYou get a small codebase spread over several files that assigns projects (for example to students or courses). Some tests fail. Read your way around it under time pressure, find…
Last asked Jan 2026
Refactor a rock-paper-scissors simulationCodingYou get existing code in which three bots play rock-paper-scissors against each other and the program prints how many games each bot won. Change it so the number of rounds is…
Last asked Sep 2025