Ethereum Fundamentals and Smart Contract Basics

Blockchain technology is transforming how we handle trust, transactions, and digital agreements. Understanding Ethereum—the world's leading programmable blockchain—is the essential first step for anyone looking to build, invest, or work in the Web3 space. This text-based course guides you from absolute beginner to a confident grasp of Ethereum's architecture, consensus mechanism, and smart contract execution. You will build a solid theoretical foundation and test your understanding with comprehensive written self-assessments designed to reinforce key concepts. What you'll learn: Understand the core architecture of the Ethereum blockchain and how the global state machine operates; Explain the transition to Proof of Stake and how validators secure the network; Analyze how smart contracts work, including basic Solidity structure and execution on the Ethereum Virtual Machine (EVM); Calculate gas fees and understand how transactions are prioritized and processed; Explore modern scaling solutions, including Layer 2 rollups and their role in network efficiency; Practice evaluating real-world decentralized application (dApp) scenarios through structured written exercises. You will start with foundational blockchain definitions and key terminology before exploring the mechanics of smart contracts, gas, and modern Layer 2 scaling. Each section concludes with a detailed written review to help you assess your progress and solidify your knowledge. This course is designed for beginners who want a clear, conceptual introduction to Ethereum without needing prior programming or blockchain experience. Start reading today to build a practical, lasting understanding of Ethereum fundamentals.