Ethereum Standards and Proposal Processes BDC Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A developer must choose a token standard for a new decentralized exchange (DEX) that will support trading of both fungible tokens and NFTs. The DEX's smart contract needs to handle both types efficiently, and the team wants to minimize the number of contract deployments. Which standard should they use for the DEX's internal asset management?

   • AERC-721 for everything, treating fungible tokens as multiple unique IDs
   • BERC-777 for fungible tokens and ERC-1155 for NFTs
   • CERC-20 for fungible tokens and ERC-721 for NFTs in separate contracts
   • DERC-1155 for both fungible and non-fungible assets
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   An NFT marketplace is integrating ERC-721 tokens. They need to display the metadata (image, name, description) for each token. Which function should they call to retrieve this information?

   • AbalanceOf(address owner)
   • BtotalSupply()
   • CtokenURI(uint256 tokenId)
   • DownerOf(uint256 tokenId)
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A protocol developer wants to propose a change to the Ethereum Virtual Machine (EVM) that would alter gas costs. They have written a detailed EIP and it has been accepted as a Draft. What is the most important next step to move it toward adoption?

   • AImplement the change in a client and test it on a testnet
   • BAsk the Ethereum Foundation to fund the development
   • CSubmit the EIP to a security audit firm
   • DMarket the EIP on social media to gain public support
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Which function in the ERC-721 standard returns the owner of a specific token?

   • AtokenURI
   • BbalanceOf
   • CgetApproved
   • DownerOf
   Reveal Solution Discussion Select an answer first
6. 10expert · hard

   An EIP author has submitted a proposal that has been assigned the number EIP-XXXX. The proposal is currently in 'Review' status. The author receives a request from an EIP editor to make significant changes to the specification. What should the author do?

   • AAsk the community to vote on whether to accept the changes
   • BIgnore the editor's request because the EIP is already in Review
   • CUpdate the EIP document and submit a new pull request with the changes
   • DWithdraw the EIP and start over with a new number
   Reveal Solution Discussion Select an answer first