Comprehensive frontend interview questions covering HTML, CSS, JavaScript, React, Vue, and modern web development practices. Core Web Technologies Fundamental concepts every frontend developer should know: HTML & DOM: Document structure, DOM manipulation, semantic HTML CSS: Box model, flexbox, grid, positioning, …

Easy-level frontend interview questions covering HTML, CSS, JavaScript, React, and Vue fundamentals. Q1: What is the DOM and how does it work? Answer: graph TB A[HTML Document] --> B[Browser Parses] B --> C[DOM Tree] C --> D[Document] D --> E[html] E --> F[head] E --> G[body] G --> H[div] H --> I[p] H --> J[span] style …

Hard-level frontend interview questions covering advanced patterns, performance optimization, and complex architectures. Q1: Explain React Fiber architecture and reconciliation. Answer: graph TB A[React Fiber] --> B[Incremental<br/>Rendering] A --> C[Pausable Work<br/>Priority-based] A --> D[Time Slicing<br/>Smooth UI] …

Medium-level frontend interview questions covering advanced React, Vue, state management, and performance optimization. Q1: Explain React Context API and when to use it. Answer: graph TB A[Context API] --> B[Avoid Prop<br/>Drilling] A --> C[Share Global<br/>State] A --> D[Provider-Consumer<br/>Pattern] style A …

Complete React guide from project setup to building a functional Todo application. Includes modern hooks, TypeScript, and best practices. Docker Setup Dockerfile 1# Build stage 2FROM node:18-alpine AS builder 3WORKDIR /app 4COPY package*.json ./ 5RUN npm ci 6COPY . . 7RUN npm run build 8 9# Production stage 10FROM …