Joined Tencent (nicknamed "Goose Factory") through campus recruitment at a second‑tier university. Career path: Tencent → foreign firm → ByteDance → Tencent. Started as an interviewer at the foreign firm and hopes to help others.
This article explains MySQL disaster‑recovery techniques, covering cold and hot backups, same‑city versus remote setups, master‑slave topologies, async, semi‑sync and full‑sync replication, the MAR strong‑sync approach, and practical recommendations for building resilient two‑city three‑center architectures.
This article explains the classic House Robber interview question, detailing the problem constraints, illustrating why a naive alternating‑house approach fails, and presenting a clear dynamic‑programming solution with recurrence, base cases, and a concise code example.
This article walks through MySQL's core concepts—including ACID guarantees, the four isolation levels, undo and redo logs, buffer pool flushing, lock types, gap locks, deadlock scenarios, and the B+‑tree based index architecture—providing interview‑ready insights and practical examples.
This article presents a classic monkey‑and‑peach puzzle, derives the minimal initial peach count using mathematical reasoning, and then demonstrates a brute‑force Python program that searches for the solution, illustrating how loops and modular checks solve the problem.
This article provides a comprehensive overview of Zookeeper, covering its purpose as a distributed coordination service, data structures, system architecture, ZAB protocol, leader election mechanisms, watcher functionality, key features, request ordering, synchronization methods, and potential consistency issues.
This comprehensive guide answers 19 core networking interview questions, covering the TCP/IP five‑layer model, HTTP fundamentals, GET vs POST, ping, status codes, differences among HTTP/1.0, 1.1, 2, 3, HTTPS, TCP connection handshake and teardown, sliding windows, flow control, half‑ and full‑connection queues, packet framing, and the browser request lifecycle.
This article explains what unit testing is, shows how to write Go unit tests using the testing package, demonstrates more expressive assertions with GoConvey, and introduces mock creation with mockery, providing practical code examples and best‑practice tips for backend developers.
This article walks through essential MySQL interview topics, covering basic concepts, OLTP vs OLAP, normalization forms, DML/DDL/DCL, varchar vs char trade‑offs, storage engines, ACID properties, primary and foreign keys, and how to monitor running queries, all presented from an interviewer's perspective.
This article presents a classic stock‑like profit maximization problem using mooncake prices, explains the input and expected output, and walks through three solution strategies—brute‑force enumeration, a greedy linear scan, and a dynamic‑programming approach—complete with Go code examples and visual illustrations.
This article explains what distributed locks are, outlines their essential properties, walks through step‑by‑step Redis implementations—from simple SETNX to Lua‑based atomic operations—and discusses reliability strategies such as master‑slave failover and RedLock while highlighting the inherent limits of any distributed lock.
