Welcome to Next.js Interview Prep

This course covers the Next.js concepts interviewers actually probe on: the App Router, rendering strategies (SSR, SSG, ISR, CSR), Server and Client Components, data fetching with caching and revalidation, dynamic routing, API routes, performance, and deployment.

What You'll Learn

• Next.js Fundamentals - Why Next.js, App Router vs Pages Router, project structure, compilation
• Rendering Strategies - SSR, SSG, ISR, CSR, and when to pick which
• Server and Client Components - RSC, use client, server actions
• Data Fetching - Fetching, caching, revalidation, loading and error states
• Routing - Dynamic, catch-all, layouts, parallel/intercepting routes, middleware
• API Routes and Backend - Route handlers, API design, authentication
• Performance and Optimization - Images, fonts, scripts, metadata and SEO
• Deployment and Production - Build output, env vars, Vercel/self-host, monitoring

How to Use This Course

Work through the chapters in order. Each lesson starts with a short hook, shows the concept with runnable code, and ends with the angles interviewers typically probe. Use the sidebar to jump around once you know the shape.

Prerequisites

• Solid React fundamentals (hooks, components, props, state)
• Basic TypeScript
• Node.js 18+ installed locally

Let's get started with the fundamentals.