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Token Standards (ERC-721/1155) 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 Token Standards (ERC-721/1155) flashcards as text

  1. Which ERC-1155 event signals a single token-type transfer?

    Answer: TransferSingle

    TransferSingle is emitted for a single id/amount move; TransferBatch covers arrays.

  2. What does ERC-721 tokenURI(tokenId) typically return?

    Answer: A URI pointing to the token's JSON metadata

    tokenURI returns a URI (often IPFS/HTTP) to a JSON file describing name, image, and attributes.

  3. Burning an ERC-721 token usually means transferring it to which address?

    Answer: The zero address (0x0)

    Burning sends the token to the zero address, removing it from circulation.

  4. In ERC-1155, which function checks balances of multiple accounts and ids at once?

    Answer: balanceOfBatch

    balanceOfBatch accepts arrays of accounts and ids, returning matching balances.

  5. What problem does the ERC-721 Enumerable extension solve?

    Answer: Listing all tokens and tokens owned by an address on-chain

    ERC721Enumerable adds totalSupply and indexing so tokens can be enumerated on-chain.

  6. Why might a developer choose ERC-721 over ERC-1155 for a 1-of-1 art piece?

    Answer: Broad marketplace support and simpler unique-ownership semantics

    ERC-721's one-token-one-owner model and wide tooling fit unique art well.

  7. What does the ERC-1155 URI event indicate when emitted?

    Answer: The metadata URI for a token id changed

    The URI event announces an updated metadata URI for a specific token id.