Ethereum Proof-of-Stake consensus algorithm interview questions covering Casper FFG and LMD GHOST. Q1: How does Ethereum consensus work (Proof-of-Stake)? Answer: Ethereum 2.0 uses Proof-of-Stake consensus (Casper FFG + LMD GHOST). Sequence Diagram: sequenceDiagram participant Proposer participant Validator1 participant …

Comprehensive Web3 and blockchain interview questions covering Ethereum, Solidity, DeFi, security, and advanced protocol design. Blockchain Fundamentals Core concepts every Web3 developer should know: Easy: Blockchain basics, Ethereum vs Bitcoin, smart contracts, gas, wallets, keys, ERC-20, NFTs, dApps, …

Easy-level Web3 interview questions covering blockchain fundamentals, Ethereum, smart contracts, and decentralized applications. Q1: What is blockchain and how does it work? Answer: graph TB A[Blockchain] --> B[Distributed<br/>Ledger] A --> C[Immutable<br/>Records] A --> D[Cryptographic<br/>Hashing] A --> …

Core principles, consensus mechanisms, and key innovations of major blockchain platforms. Bitcoin (BTC) Core Principles Digital gold: Store of value, not programmable Decentralization: ~15,000 full nodes worldwide Security: Most secure blockchain (highest hash rate) Simplicity: Intentionally limited functionality …