// the find
CyC2018/CS-Notes
:books: 技术面试必备基础知识、Leetcode、计算机操作系统、计算机网络、系统设计
CS-Notes is a Chinese-language study guide for technical interviews, covering algorithms, OS, networking, databases, Java internals, and system design. It's aimed at developers preparing for interviews at Chinese tech companies, where this style of breadth-first CS fundamentals review is standard. With 184k stars it's one of the most-starred repos on GitHub, period.
The coverage is genuinely broad without being shallow — the Java concurrency and JVM sections in particular go deeper than most English-language interview prep resources. The writing follows consistent formatting guidelines (the author references a Chinese copywriting style guide), which makes navigating across dozens of markdown files less painful than it sounds. It includes worked LeetCode solutions alongside the theory, so you're not left bridging the gap yourself. The system design section covers distributed systems topics like consensus, replication, and message queues at a level that's actually useful rather than hand-wavy.
Last meaningful update was August 2024 and the repo has effectively been in maintenance mode for years — several sections reference Java 8 as current and don't cover anything past JDK 11. It's entirely in Chinese, which cuts off a large chunk of its potential audience and makes it hard to contribute to or verify. The content is notes, not a textbook — there's no explanation of prerequisites, no learning path, and no indication of which sections matter more than others, so a newcomer has no idea where to start. Some of the system design content is surface-level compared to dedicated resources like the System Design Primer, which covers similar ground in more depth.