Technical Interview Handbook

A comprehensive technical interview preparation guide covering Data Structures & Algorithms, Frontend, Backend, Databases, DevOps, System Design, and more.

Sections

🧮 Data Structures & Algorithms

Master the fundamentals — complexity analysis, core data structures, and essential algorithms with code and diagrams.

🌐 Frontend

HTML, CSS, JavaScript, TypeScript, and React — from basics to advanced patterns.

⚙️ Backend

Node.js architecture, Express.js routing, authentication, and security.

🗄️ Databases

MongoDB, SQL, PostgreSQL, Prisma, and Drizzle ORM.

🐳 DevOps & Infrastructure

Linux, Docker, Kubernetes, Prometheus, and Grafana.

🏗️ System Design

Scalability, CAP theorem, caching, message queues, and case studies.

🏗️ Low-Level Design

OOP fundamentals, SOLID principles, and design patterns.

🌐 High-Level Design

System design fundamentals at scale — databases, caching, and microservices.

🔧 Git

Version control from basics to advanced workflows and recovery.

🐧 Bash & Shell

Command-line operations, scripting, and process management.

☁️ AWS

Compute, storage, databases, networking, and security services.