“Describe a smart contract you’ve developed. What was its purpose, and how did you handle security risks like reentrancy?”（描述你开发过的智能合约，其用途是什么？如何应对重入攻击等安全风险？）
“Explain the concept of ‘gas’ in Ethereum and why optimizing gas is important for DApp users.”（解释以太坊中的“Gas”概念，以及为什么Gas优化对DApp用户很重要？）
“How would you design a decentralized voting system using smart contracts? Key considerations?”（如何用智能合约设计一个去中心化投票系统？关键考虑因素有哪些？）
“What are the main challenges in cross-chain communication, and how do projects like Polkadot or Cosmos address them?”（跨链通信的主要挑战是什么？Polkadot或Cosmos等项目如何应对？）
“Compare Optimistic Rollup and ZK-Rollup as Layer 2 solutions. What are their trade-offs in terms of security and cost?”（对比Optimistic Rollup和ZK-Rollup两种Layer2方案，在安全性和成本上的权衡是什么？）
示例： “In my previous project, I was tasked with developing a decentralized NFT marketplace (Situation). My role was to design the smart contracts for NFT minting and trading, and integrate them with a React frontend (Task). I used Solidity to write the contracts, implemented access controls to prevent unauthorized minting, and optimized gas by reducing unnecessary storage operations. For the frontend, I used Ethers.js to connect users’ MetaMask wallets and display real-time on-chain data (Action). As a result, the marketplace handled over 10,000 NFT transactions with zero security incidents and an average gas cost 20% lower than similar projects (Result).”
解释技术概念：类比+逻辑拆解
用简单类比或逻辑拆解降低理解门槛，体现沟通能力：
示例（解释区块链去中心化）： “A traditional database is like a centralized library—one entity controls all the books. A blockchain, however, is like a distributed library where every participant has a complete copy of the books. No single person can add or remove a book without the majority’s agreement, which ensures transparency and prevents tampering.”
应对行为问题：展现软实力
Web3团队重视协作、创新与风险意识，需用实例证明：
高频问题：
“How do you stay updated with the latest Web3 technologies?”（如何跟进最新Web3技术？）
回答：“I regularly follow projects like Ethereum Foundation, ConsenSys, and industry researchers on Twitter. I also contribute to open-source Web3 projects on GitHub and read technical whitepapers to understand emerging trends like DeFi or DAOs.”
“Describe a time you faced a technical challenge in a Web3 project. How did you overcome it?”（描述一次Web3项目中的技术挑战及解决过程。）
回答：“While building a DeFi protocol, we encountered a reentrancy vulnerability during testing. I first audited the contract using tools like Slither, then implemented the ‘Checks-Effects-Interactions’ pattern and added a reentrancy modifier. We also conducted a third-party audit to ensure security before deployment.”
