This article provides a comprehensive collection of 69 Spring interview questions and answers, covering core concepts such as the framework overview, benefits, modules, IoC container, bean scopes, dependency injection, AOP, annotations, JDBC template, DAO support, transaction management, and MVC architecture.
This article provides a comprehensive overview of the Spring framework, covering its low‑invasion design, IoC container, dependency injection types, bean scopes, autowiring options, bean creation methods, post‑processors, zero‑configuration annotations, and AOP support with AspectJ, supplemented by practical code examples.
This article explains JavaScript's single‑threaded runtime, demystifies setTimeout's true behavior, discusses timer precision across browsers, and showcases practical patterns such as recursive timeouts, event throttling, GIF replay in IE, and delayed blur handling.
Learn how to bypass the limitations of the default Windows .msi Node installer by creating a dedicated directory structure, manually installing multiple Node versions, configuring npm directories, and setting environment variables for a clean, flexible, and fully transparent Node.js development environment.
This article explores proper error handling in browser‑side JavaScript, comparing flawed silent‑failure approaches with robust try‑catch and global onerror techniques, and demonstrates how to test, debug, and report exceptions in both synchronous and asynchronous code.
This article explains why dropping large MySQL tables can heavily impact server I/O, compares ext3 and ext4 file‑system behavior, and provides a step‑by‑step method using hard links and the truncate tool to minimize downtime and I/O load.
This article details JD.com's journey from physical servers to a massive Docker‑based cloud‑native platform, covering challenges, architecture, elastic scheduling, monitoring, and resource‑driven operations that support tens of thousands of containers across multiple data centers.
This article examines the common reasons MySQL performance may lag—outdated hardware, sub‑optimal database design, and poorly written application code—and provides concrete guidance on CPU, memory, storage, schema, and query optimizations to improve response times.
This article outlines the design of a payment risk control system, detailing functional and non‑functional requirements, core components such as real‑time, near‑real‑time, and batch engines, rule and penalty centers, and explains the role of CEP and Drools in achieving flexible, high‑performance fraud detection.
This article chronicles Zhang Xiaolong’s journey from a modest engineering student and free‑email developer to the mastermind behind WeChat, highlighting his technical experiments, product pivots, and leadership decisions that reshaped China’s social‑media landscape.
This article explains a practical architecture for aggregating logs from distributed Docker containers by employing Flume NG as a lightweight log collector, Kafka as a high‑throughput message bus, and custom sinks to store logs per service, module and day with low latency and minimal resource impact.
This article outlines a comprehensive, stage‑by‑stage roadmap for PHP developers, detailing the essential Linux, Nginx, MySQL, PHP, front‑end, and system‑design skills required at the basic, intermediate, and advanced levels to guide self‑directed learning and career growth.
This tutorial walks through preparing the PMD environment, exploring its directory structure, and step‑by‑step instructions for implementing a custom rule—such as enforcing braces on while loops—using both Java code and XPath expressions, including packaging and execution details.
This article explains how a simple 20‑line multi‑armed bandit implementation can replace traditional A/B testing by continuously balancing exploration and exploitation to automatically discover the most effective UI variant, reducing manual analysis and improving conversion rates.
This guide explains Linux traffic control (TC), covering its core components, queueing disciplines, classes, filters, burst parameters, and provides step‑by‑step command examples to limit download speeds for individual IPs or subnets.
This article presents a practical architecture for centrally collecting dispersed logs from Docker‑based services in a distributed environment by leveraging Flume NG as a non‑intrusive log agent, Kafka as a high‑throughput message bus, and custom sinks to partition logs by service, module, and day.
This presentation details how Ctrip's hotel R&D team leverages machine learning and big data to address OTA-specific challenges, improve key service KPIs, evaluate project benefits, and deploy models through a robust pipeline and architecture, offering practical case studies and operational insights.
This article explains the principles and practical steps for implementing dynamic class loading and hot‑fixes in Android by manipulating DexClassLoader, PathClassLoader, and bytecode, illustrated with the Qzone hot‑fix solution and open‑source Nuwa and HotFix projects.
The article explains the functional and non‑functional requirements, common pitfalls, and detailed architecture—including real‑time, near‑real‑time, and batch engines, rule and penalty centers, and CEP technology—of a payment risk control system aimed at detecting and mitigating fraud while maintaining performance and flexibility.
This comprehensive guide walks you through Vim’s history, core editing modes, essential commands for navigation, editing, searching, and file management, as well as advanced features like visual mode, split windows, and configuration options, providing a solid foundation for efficient text editing.
