2024-Fall-Midterm

• What is the difference between PoS and PoW?
• What is gas? What is EIP-1559? How did things change before and after EIP-1559?
• What are the different account types in Ethereum, and how do they differ?
• What is ERC-20, and how does it work?
  • The interface
  • The operations
  • weird erc20
• What is ERC-721, and how does it work?
  • The interface
  • The operations
• What are the differences between ERC-20 and ERC-721, Fungible Tokens and Non-Fungible Tokens (NFTs)?
• What is an ERC-4626 vault? How does it work, and what are the security concerns? How can they be mitigated?
• What is the difference between receive and fallback functions?
• What is a storage layout, and how are slots calculated?
• How do proxy patterns work, and what are the differences between various proxy patterns?
• What are the security concerns with upgradeable proxies? How can they be mitigated?
• What is the difference between call and delegatecall in terms of msg.sender and msg.value?
• What is access control, and what are some examples?
• What is reentrancy? What are the types of reentrancy, and how can it be mitigated?
• How does ECDSA work? What is the relationship between the private key, public key, and signature?
• What is a Merkle root, and what are the potential issues? How can they be prevented?
• How can secure randomness be retrieved on-chain? What methods are not secure?
• How does a multisig wallet work? What are the potential concerns in multisig implementations?