Practice Test GeeksNFT Development Practice Test
← All NFT Flashcard Decks

Advanced NFT Mechanics Flashcards

7 cards from real NFT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Advanced NFT Mechanics flashcards as text

  1. In ERC-721, which function is used to safely transfer a token while checking that the recipient contract can handle ERC-721 tokens?

    Answer: safeTransferFrom

    safeTransferFrom verifies the recipient implements onERC721Received before completing the transfer.

  2. What does the ERC-2981 standard add to NFT contracts?

    Answer: Royalty payment information

    ERC-2981 provides a standardized way to signal royalty amount and recipient for secondary sales.

  3. Which interface must a contract implement to be recognized for capability detection like ERC-721 support?

    Answer: ERC-165

    ERC-165 defines supportsInterface, allowing contracts to advertise which interfaces they implement.

  4. In ERC-1155, why is balanceOfBatch more gas-efficient than multiple balanceOf calls?

    Answer: It queries multiple token IDs in one call

    balanceOfBatch returns balances for many id/owner pairs in a single function call, reducing overhead.

  5. What is a common purpose of a tokenURI returning an IPFS hash rather than an HTTP URL?

    Answer: Content-addressed immutability

    IPFS hashes are content-addressed, so the metadata cannot change without changing the hash.

  6. Which event must ERC-721 emit when ownership of a token changes?

    Answer: Transfer

    The Transfer event logs from, to, and tokenId whenever a token moves between addresses.

  7. What is the main advantage of lazy minting?

    Answer: Minting gas is deferred until first purchase

    Lazy minting defers the on-chain mint (and its gas) until a buyer actually purchases the NFT.