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ERC-721 vs. ERC-1155 Standards 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 ERC-721 vs. ERC-1155 Standards flashcards as text

  1. How does ERC-1155 typically handle metadata URIs to support many tokens?

    Answer: A single URI template with an {id} substitution placeholder

    ERC-1155 uses a URI template where {id} is replaced with the hex token ID, avoiding per-token storage.

  2. In ERC-721, which event is emitted when ownership of a token changes?

    Answer: Transfer

    ERC-721 emits a Transfer event with from, to, and tokenId on ownership change.

  3. Which event does ERC-1155 emit for a single token transfer?

    Answer: TransferSingle

    ERC-1155 emits TransferSingle for one token type and TransferBatch for many.

  4. A game wants gold coins, potions, and unique swords in one contract. Which standard fits best?

    Answer: ERC-1155

    ERC-1155 handles fungible coins/potions and unique swords together in a single contract.

  5. What does ERC-1155's balanceOfBatch allow callers to do?

    Answer: Query multiple owner/ID balance pairs in one call

    balanceOfBatch returns balances for arrays of owners and token IDs in a single query.

  6. Which standard's balanceOf takes only an address and returns a count of owned tokens?

    Answer: ERC-721

    ERC-721 balanceOf(owner) returns how many tokens an address owns; ERC-1155 also needs a token ID.

  7. What is a key risk of using transfer instead of safeTransfer to an unaware contract?

    Answer: Tokens may become permanently locked

    Sending to a contract that cannot handle tokens without the safe variant can permanently lock them.