This article presents a curated set of 140 software testing interview questions covering topics such as API testing, automation frameworks, performance testing, CI/CD, database operations, Selenium, mobile testing, and related concepts, offering valuable preparation material for candidates.
This article explains the various stages of a CI/CD pipeline, detailing the roles, processes, and tools involved in continuous integration, testing, building, deployment, and monitoring, and highlights why such pipelines are essential for fast, scalable software delivery in modern organizations.
This article explains how the GoGoCode AST‑based tool can automatically transform large Vue2 codebases to Vue3 by applying a set of around thirty migration rules, covering async components, custom directives, router and Vuex changes, and provides installation, usage examples, and a comprehensive rule table.
This guide explains how kubectl interacts with the Kubernetes API, walks through command‑completion setup, custom column output, multi‑cluster and namespace switching, and shows how to extend kubectl with plugins such as kubectx, krew, and custom scripts, boosting productivity for cloud‑native workflows.
The article explains the problems of manual cloud resource provisioning, introduces Terraform's Infrastructure as Code approach, describes a company-specific workflow using a front‑end request portal, GitOps, and Mobius automation, and outlines how to import existing resources and perform bulk exports with Terraformer.
This article examines the challenges of exploding microservice counts, rising infrastructure costs, and complex topologies, and details a cloud‑native, service‑decoupled DevOps infrastructure that uses standardization, declarative provisioning, intelligent automation, contract and diff testing, and a unified release engine to dramatically improve delivery efficiency and reliability.
This guide explains how to set up ADB on a Windows PC, connect an Android device, capture screenshots, and run a Python script that detects the game pieces and board in WeChat's Jump mini‑program to automatically perform jumps based on calculated distances.
This guide explains how to create a custom DingTalk robot using Python 3.7, covering webhook configuration, security signing, step‑by‑step setup in the PC client, and a complete code example for sending text messages.
The article shares a tester’s two‑year growth experience, illustrating how testing focus shifts from basic functional checks to comprehensive test plans that combine interface, data‑construction, mock, and debugging techniques for various backend, frontend, and full‑stack scenarios.
The article describes how a to‑B SaaS platform tackled exploding microservice counts, soaring infrastructure costs, complex topologies and high‑frequency releases by standardizing, declaratively provisioning, and intelligently automating cloud‑native DevOps services, resulting in dramatically improved delivery efficiency and reliability.
This article explains how automation drives DevOps practices by improving speed, consistency, and reliability across the software lifecycle, discusses tools and challenges, and outlines future trends for integrating automated testing and infrastructure-as-code in modern development operations.
The Creation Quality Platform (CQ) automates large‑scale detection of templates, mini‑programs, and special‑effect resources across ByteDance apps, combining automated pipelines, algorithmic classification, CV/NLP checks, and prioritized task routing to boost efficiency, accuracy, and creator experience while reducing manual effort.
JApiDocs is a zero‑annotation, out‑of‑the‑box tool that parses SpringBoot controller code and JavaDoc comments to automatically generate HTML API documentation, offering quick setup, client model export, and various features that simplify backend documentation workflows.
This article guides you through creating a Python script that fetches real‑time stock quotes, evaluates price changes, and automatically sends email notifications, while covering required libraries, scheduling, packaging as an executable, and future enhancements for quantitative trading.
This tutorial shows how to install the filestools library, use its curl2py command to convert cURL requests into ready‑to‑run Python code, and demonstrates the process with a real‑world example, saving time and avoiding manual copying of headers and parameters.
This guide explains how to use standard Linux utilities and a custom Bash script to view, modify, save, and restore file timestamps, enabling attackers or administrators to conceal or recover evidence of file changes on a server.
This article reveals powerful yet often overlooked Postman features—including environment variables, global and collection scopes, pre‑request scripts, test scripts, and token automation—demonstrating how to streamline API debugging across multiple environments, automate authentication, and manage variable lifecycles for more efficient development workflows.
This article examines the quality challenges of Alibaba's DEF frontend code review system, identifies issues such as short review times, low comment rates, and oversized changes, and proposes practical solutions including staged reviews, better notifications, comment defect tagging, reviewer recommendation, and static analysis integration.
The article explains how external results, cost‑only measurement before user adoption, and four principles—Build Quality In, Eliminate Waiting, Eliminate Trivial Work, and Monitor Everything—combine to speed up the verification loop and enable rapid, high‑quality software delivery.
This article explains how AI‑powered generative design transforms traditional design workflows by automating complex creations, enabling rapid iteration, highlighting both its efficiency gains and the paradox of too many choices, and showcases accessible online tools and striking artistic examples.
This guide explains how to set up IntelliJ IDEA templates to automatically generate class and method Javadoc comments, including adding author and date placeholders, creating live templates for @param and @return annotations, and customizing variable expressions with Groovy scripts.
This article describes a complete workflow for iOS UI development that centralizes color definitions in a JSON palette, synchronizes them via a CocoaPods post‑integrate hook, and automatically generates Objective‑C/Swift color constants and Xcode code snippets using Ruby and ERB templates, dramatically improving efficiency and reducing manual errors.
Learn how to replace manual rc.local startup scripts with elegant solutions using Crontab's @reboot feature and Systemd services, including step‑by‑step commands and advanced scheduling tricks for reliable automatic execution after a reboot.
This tutorial explains how to use Jenkins to integrate command‑line tools and webhooks for automating GitLab branch creation, covering API discovery, Postman testing, pipeline scripting, credential handling, shared library implementation, and final system configuration.
The automatic front‑end disaster‑recovery solution packages an npm tool and visual backend that generates on‑demand API fallback data, uses a whitelist and static parameters to target backups, syncs results to developers, and after deployment raised coverage from ~30% to ~70%, automating 80% of backups.
This tutorial explains how to build a Python alarm clock that plays a sound, uses text‑to‑speech for voice alerts, and optionally sends an email via QQ SMTP when the alarm triggers, providing full source code and step‑by‑step instructions.
The Blue Whale Job Platform (bk-job) by Tencent offers a comprehensive, front‑end/back‑end separated solution for script execution, file distribution, task scheduling, and workflow orchestration, providing secure command detection, versioned scripts, and extensible file source management to streamline enterprise operations.
This guide explains how to configure GitHub Actions to automatically synchronize GitHub repositories with Gitee, covering the basics of GitHub Actions, synchronization methods, action selection or creation, required preparation steps, workflow syntax, and practical code examples.
Facebook detailed its multi‑year journey from MySQL 5.6 to 8.0, explaining why it stayed on 5.6 for MyRocks development, the massive patch‑porting effort, replica‑set migration steps, adoption of row‑based replication, extensive automation testing, and the performance and compatibility issues uncovered along the way.
The 2021 State of Data Science report shows how COVID‑19 has impacted investment, highlights Python's dominance, examines automation's growing role, and reveals corporate attitudes toward open‑source contributions, offering data‑driven insights for professionals and educators alike.
This guide explains Selenium 4's deprecation of DesiredCapabilities, shows how to use Options for Chrome, Firefox, IE and Safari, demonstrates the updated Actions API for clicks, double‑clicks, right‑clicks and drag‑and‑drop, and details the FluentWait syntax changes with code examples.
This article outlines the five core competencies—automation, communication and collaboration, cloud computing, security, and operational support—that aspiring DevOps engineers need to master in order to deliver software quickly, reliably, and securely in today’s competitive market.
This guide shows three reliable ways to run custom scripts automatically after a Linux machine boots—by editing /etc/rc.local, using a crontab @reboot entry, or creating a dedicated systemd service—along with example commands and advanced timing options.
This article introduces a practical three‑question thinking framework and five guiding principles that help developers and product teams clarify goals, assess current status, and design effective implementation paths, ultimately improving productivity and reducing wasted effort.
This tutorial walks through setting up a Python environment, installing libraries, creating and editing Word documents with python-docx, converting files and generating PDFs using win32com, extracting Excel data with xlrd, visualizing scores with matplotlib, and automating batch document generation with docx-mailmerge.
The article explains why test suites in enterprise DevOps must run quickly—ideally within five to fifteen minutes—to keep developers productive, and outlines common causes of slow tests such as unnecessary sleep statements, poor test data handling, and lack of event‑driven design, recommending refactoring and optimization.
This article provides a comprehensive Python tutorial covering how to send GET and POST requests, handle HTTPS verification, perform file uploads and downloads, set request timeouts, use basic and token authentication, manage sessions, generate signatures, and organize a test automation framework with configuration, common utilities, test data, test cases, reporting, and execution scripts.
A global cybersecurity firm replaced its fragmented cron‑based build, test, and deployment processes with an automated Jenkins CI/CD pipeline, integrating GitLab, Docker, and monitoring tools to achieve continuous delivery, visibility, and faster, reliable releases across multiple projects.
This guide shows how to use a Windows batch file together with MySQL's mysqldump tool to create scheduled backups of one or multiple databases, including command options, full‑path execution, loop timing, and a ping‑based pause to avoid interference.
This article examines how a securities firm leveraged a low‑code development platform to build a visual operations‑on‑duty management system, detailing the background, requirements, implementation, benefits, deployment challenges, and future plans for an integrated operations development platform.
Learn how to manually create an iOS component library using CocoaPods, automate the process with the pod lib create scaffold, customize private templates, and develop a CocoaPods plugin to streamline library generation, complete with code examples and project structure details.
This article details the evolution of JD's Family Account frontend project, covering multi‑platform technical selection, React Native‑based architecture, three‑level component reuse, automation scripts for Redux, interface fault‑tolerance mechanisms, and future plans for broader data services and SDK support.
This article provides a step‑by‑step tutorial on building a DevOps pipeline that integrates Docker, Jenkins, GitLab, Maven, and SpringBoot, covering environment setup on CentOS, Maven pom configuration, Dockerfile creation, shell scripting for image building, multi‑machine deployment, and practical Jenkins job configuration.
Ansible, a rapidly rising open‑source automation platform, lets operations engineers streamline workflows, boost efficiency, and cut human error by offering thousands of built‑in modules and a simple, agent‑less interface that’s easy for beginners yet powerful enough for complex tasks.
This article outlines practical shell‑script guidelines for automating system and application operations, covering script header conventions, formatting, error handling, safe use of commands, variable handling, file packaging, pipeline restrictions, concurrency locks, logging, and risk‑mitigation strategies to make automation both efficient and secure.
Learn how to automate a web-based Sudoku game using Python's Selenium for data extraction, implement an efficient backtracking and bitwise algorithm to solve the puzzle, and programmatically fill the solution back into the browser, achieving performance improvements from 17 seconds to just over 3 seconds.
Learn how to efficiently create, open, edit, and save Excel workbooks using Python’s openpyxl library, covering worksheet management, cell operations, merging, formatting, formulas, row/column iteration, and value-only extraction, with practical code examples for both small and large files.
This guide walks you through building a free Python Tkinter desktop application that merges multiple PNG or JPG images with background audio into a video using FFmpeg, covering environment setup, GUI design, file handling, log capture, video generation, and preview steps.
This article describes the challenges of private deployment for micro‑service architectures at JD's Transaction Center and presents a cloud‑native rapid‑deployment platform that uses standardized metadata, drag‑and‑drop component design, automated resource initialization, and probe‑based health checks to achieve fast, low‑cost, and reliable service rollout.
This tutorial demonstrates how to write a short Python script that continuously monitors for a USB drive, automatically copies its contents to a specified folder, and then shows how to package the script into a standalone Windows executable using PyInstaller with various options.
This guide shows how to set up an iPhone shortcut that instantly displays your health code with a single tap, detailing each step from adding the code to the home screen to configuring a trigger in the Accessibility settings.
This article describes how QA engineers automated the repetitive Excel‑based mapping and validation process of a valuation system by using Python pandas scripts to filter, compare, and export data, reducing manual effort from ten minutes to under one minute while improving accuracy and coverage.
This tutorial walks you through installing Selenium and ChromeDriver, configuring the environment, and using Python code to automatically navigate Dangdang's bestseller pages, extract book details with pyquery, and save the results into a CSV file for further analysis.
Learn how to use Postman for practical API testing by walking through three hands‑on examples—searching Baidu, interacting with WeChat’s public API, and triggering alerts on a specialized radio communication system—covering request setup, parameter handling, assertions, and common pitfalls.
This article provides a detailed tutorial on using various Python libraries such as xlrd, xlwt, xlutils, xlwings, openpyxl, XlsxWriter, win32com, and pandas for reading, writing, modifying, and visualizing Excel files, complete with code examples and best‑practice tips.
The article emphasizes that a well‑designed CI/CD pipeline should automate the entire build and deployment process into a single command or script, enabling new developers to produce deployable artifacts quickly, while warning against excessive manual steps that hinder efficiency.
DevOps combines development and operations into a unified lifecycle—continuous development, integration, testing, feedback, monitoring, deployment, and maintenance—offering faster delivery, improved collaboration, automated processes, and higher software quality, with tools such as Git, Jenkins, Docker, and Ansible supporting each phase.
This article explains the origins of DevOps, its evolution from agile practices, and how containers and Kubernetes enable a seamless, automated pipeline—from code checkout and build to testing, code analysis, artifact storage, image creation, and staged deployment—illustrated with real‑world Jenkins pipelines and logs.
This guide explains why static /etc/fstab entries can waste resources, introduces the autofs daemon for on‑demand mounting, and provides step‑by‑step commands and configuration examples to set up automatic CD‑ROM mounting on a Linux server.
This article explains the fundamentals and query process of the Domain Name System (DNS), then details Qunar's evolving DNS architecture—including the initial system, DNSDB management, DNS view, EDNS, HTTPDNS, and intelligent traffic switching—highlighting operational automation and security enhancements.
This article explores the fundamentals of IT monitoring, examines common challenges such as scalability, reliability, and alert fatigue, compares four implementation approaches—from open‑source to fully custom solutions—and presents practical techniques like alert convergence, suppression, and automation to build a robust, adaptable monitoring platform.
This article outlines the essential requirements, common challenges, and practical best‑practice guidelines for transitioning a monolithic system to a microservices architecture, emphasizing team autonomy, automation, resilience, and standardized development, deployment, and operations processes.
This article explores the complexity of IT operations, outlining common misconceptions, essential capabilities, organizational and individual pain points, and presents self‑help strategies such as SRE, DevOps, automation, and AIOps to achieve sustainable, scalable, and intelligent operations within enterprises.
This article compiles the 20 most common DevOps interview questions, providing detailed explanations of concepts such as the DevOps‑Agile distinction, core benefits, key tools, anti‑patterns, KPI metrics, automation advantages, containers, microservice frameworks, version control practices, Git revert techniques, post‑mortem meetings, asset vs configuration management, continuous testing elements, and essential development and infrastructure operations.
This article presents JD Daojia's practice of containerizing MySQL, detailing the underlying resource platform, custom container scheduling algorithm, high‑availability design, monitoring system, and an automated operations platform that together improve performance, cut costs, and boost operational efficiency.
This article describes Qunar's end‑to‑end automated workflow for detecting high‑risk Jar component vulnerabilities, collecting asset information, orchestrating remediation with a SOAR platform, and leveraging the TCDEV auto‑upgrade service to reduce manual effort and improve security operations efficiency.
This tutorial walks you through creating an interactive Excel weather dashboard using Python's xlwings and requests libraries, covering API selection, data retrieval, code integration, Excel macro setup, UI design, and dynamic updates for multiple Chinese cities.
This article shares three years of experience building an automated performance‑testing platform for Alibaba Cloud Elastic Compute, covering what performance testing is, how to design comprehensive tests for CPU, memory, storage, network and OS, and the essential skills engineers need to become true performance architects.
A sysadmin narrates how he monitors four Redis nodes, detects master failure with PING, promotes a slave using SLAVEOF, reconfigures the remaining replicas, and ultimately automates the entire process with a custom Sentinel program and a multi‑node Sentinel cluster for high availability.
This article explains the DevOps lifecycle—covering planning, coding, building, testing, releasing, deploying, operating, monitoring, and CI/CD—and lists popular tools for each stage to help teams achieve continuous delivery and efficient collaboration.
This article details ByteDance's evolution of chaos engineering platforms and high‑availability practices, covering service types, architectural upgrades, fault‑center design, explosion‑radius control, steady‑state algorithms, automated experiments, and future plans for resilient infrastructure.
The article explains that a successful outcome‑driven enterprise data strategy requires a well‑aligned technical roadmap covering architecture, governance, storage, analytics, automation and emerging technologies such as AI and blockchain, and offers practical steps for assessing readiness and prioritizing implementation.
Learn how to use Python to send real-time progress updates and completion alerts via email for long-running tasks such as model training, data processing, and financial modeling, by leveraging the email, smtplib, and MIME libraries to build customizable notifications with images and attachments.
Learn how to write a few lines of Python that continuously monitor for a USB drive, automatically copy its contents to a specified folder, and then package the script into a standalone Windows executable using PyInstaller with optional parameters for single‑file output, hidden console, and custom icons.
This guide shows Windows users how to programmatically change the desktop background using Python's ctypes library, walk through retrieving the script’s directory, filtering image files, selecting one at random, and applying it with SystemParametersInfoW, all without installing external packages.
This guide explains how to automate Linux tasks by configuring boot‑time services with chkconfig and rc.local, using the at command for one‑off jobs, and setting up recurring jobs with crontab, complete with syntax, examples, and practical shell script integration.
This guide explains why manual regression testing of a WeChat mini‑program becomes a bottleneck, compares Jest‑based SDK and Minium frameworks, shows how to set up the environment, write page‑object scripts, configure and run tests, generate reports, and troubleshoot common issues.
This article surveys the rapidly growing no-code and low-code ecosystem, explaining the concepts, distinguishing between no-code and low-code, and presenting a curated list of 145 startups across categories such as website builders, mobile app creators, internal tools, workflow automation, data platforms, finance, payments, commerce, analytics, and form builders.
The article details Ctrip's development of a cloud‑native AVD IaaS platform that leverages Kubernetes, Docker, and Android Virtual Devices to provide scalable, cost‑effective, and high‑availability mobile automated testing infrastructure, addressing hardware costs, performance, and operational challenges while supporting continuous integration pipelines.
This guide shows how to configure IntelliJ IDEA to automatically generate Javadoc class and method comments using file templates and live templates, including step‑by‑step settings, custom Groovy scripts for @param and @return, and verification of the results.
This guide explains the architecture of ADB, how to install it, and provides a comprehensive list of commands for connecting devices, managing apps, transferring files, capturing screenshots, controlling the shell, and performing performance analysis on Android devices.
This article explains what DevSecOps is, why integrating security into DevOps is essential in fast‑paced software delivery, outlines its key characteristics and benefits, and provides practical guidance on organizational, process, and tooling practices—including CI/CD pipelines and open‑source security tools.
Learn step-by-step how to use Python's Selenium library to automate login, scroll through QQ Space, extract historical posts and download album photos, including driver setup, code snippets for login, shuoshuo retrieval, and photo downloading, enabling you to preserve nostalgic content.
This guide walks you through installing AutoKey on Linux, configuring its UI, creating typo‑fix phrases, setting window filters, assigning hotkeys, and writing Python scripts to automate repetitive typing tasks, helping you streamline your workflow and reduce keystroke effort.
This article shares seven practical Python scripts—from web‑scraping Zhihu images and chatting bots to AI poem analysis, lottery generation, automatic apology letters, screen recording, and GIF creation—demonstrating how to avoid reinventing the wheel while learning useful automation techniques.
iQIYI’s technology team built a non‑intrusive robustness‑testing platform that injects engineered “dirty data” into intercepted HTTP responses via an ASM‑hooked SDK, letting users configure mutation rules through a web console and run UI, monkey, or manual tests that have already uncovered numerous hidden crashes, achieving over 50 % defect‑closure and markedly improving app stability.
Facing rising traffic, JD Daojia’s in‑house load‑testing platform was redesigned to automate script management, enable distributed JMeter execution, integrate real‑time monitoring, and support custom RPC protocols, dramatically lowering manual effort, cutting test cycles from an hour to fifteen minutes while ensuring system stability.
An operations engineer narrates how he monitors a four‑node Redis cluster, detects master failure with continuous PINGs, promotes a slave to master, reconfigures replicas, and automates the entire process with a sentinel program and a sentinel cluster for high availability.
This tutorial introduces Python's openpyxl library for reading, writing, and manipulating Excel files, covering installation, basic methods, and four practical examples including creating multiplication tables, inserting rows, transposing data, and importing text files into spreadsheets.
This article presents a collection of Python 3.6.4 scripts that demonstrate how to scrape Zhihu images, converse with chatbots, classify Tang poems using NLP, generate random lottery numbers, automatically compose apology letters, capture screen images, and create animated GIFs, providing practical code examples for each task.
This article explains how DevOps transforms software testing by moving from isolated, waterfall‑style testing to continuous, automated, shift‑left practices, and outlines best‑practice recommendations such as test automation, tool selection, metrics, documentation, and the role of test‑automation engineers.
This article explains how Python can automate everyday file‑management tasks—deleting old files, sorting files by type, and scheduling the process with crontab—by providing clear step‑by‑step code examples that turn repetitive work into a few seconds of effort.
This tutorial explains how to set up Python and Appium on a PC, configure Android SDK and device debugging, and write a Python script that automatically reads and replies to QQ messages on an Android phone.
This guide shows how to use Python to post text, markdown, and image‑text (news) messages to a WeChat Work webhook, covering required headers, payload structures, and example code for each message type.
This article explains what a CI/CD pipeline is, why it is essential for DevOps, outlines its standard stages, discusses implementation steps and tool‑selection principles, highlights current cloud‑native trends, and warns against common anti‑patterns that can hinder continuous delivery.
This article introduces the Jenkins Deploy Dashboard plugin, explains how to visualize deployment status across environments, and provides step‑by‑step instructions with code examples for adding deployments to the dashboard, creating the view, and adding deployment buttons to pipelines.
The article describes how a rapidly growing development team built a one‑click, cloud‑native platform that automates the provisioning, configuration, Docker image creation, and Kubernetes deployment of diverse test environments, addressing challenges such as heterogeneous tech stacks, middleware variety, and configuration inconsistencies.
This article presents fifteen practical Linux command‑line techniques—including quick file truncation, large file generation, secure disk wiping, system‑disk creation, process runtime inspection, real‑time log monitoring, timestamp conversion, execution timing, ASCII lookup, handling garbled filenames, retrieving public IP, batch downloading, and command‑history shortcuts—to help users automate tasks and improve efficiency.
This article compiles a comprehensive set of Bash scripts that automate common Linux server tasks such as file consistency checks, log cleanup, network traffic monitoring, port scanning, user management, firewall rules, and service health checks, providing sysadmins with ready‑to‑use solutions for efficient operations.
ByteDance’s cloud‑native migration of stateful services uses a custom SolarService extending StatefulSet with Budset CRD to handle versioned data, shard‑aware routing, NUMA‑aware scheduling, advanced storage, eBPF monitoring, and automated PDB eviction, delivering efficiency, cost savings, and reliable rolling upgrades.
