NFT Token Standards (ERC-721/1155) 2

Question 1

In ERC-721, which function returns the address that owns a given tokenId?

Accepted Answer

ownerOf(uint256)

Answer

balanceOf(uint256)

Answer

tokenOwner(address)

Answer

getApproved(uint256)

Question 2

What does ERC-721's safeTransferFrom do that transferFrom does not?

Accepted Answer

Checks the recipient can receive ERC-721 via onERC721Received

Answer

Skips approval checks

Answer

Mints a new token

Answer

Burns the token after transfer

Question 3

ERC-1155 supports which type of token in a single contract?

Accepted Answer

Both fungible and non-fungible

Answer

Only fungible

Answer

Only non-fungible

Answer

Only soulbound

Question 4

Which ERC-1155 function transfers multiple token types at once?

Accepted Answer

safeBatchTransferFrom

Answer

safeTransferFrom

Answer

batchMint

Answer

transferAll

Question 5

What standard is used to detect whether a contract implements ERC-721?

Accepted Answer

ERC-165 supportsInterface

Answer

ERC-20

Answer

ERC-2981

Answer

ERC-4626

Question 6

In ERC-721, what does approve(address, uint256) grant?

Accepted Answer

Permission for one address to transfer one specific token

Answer

Ownership of the token

Answer

Operator rights over all tokens

Answer

The right to burn the contract

Question 7

ERC-1155 uses a single URI with which placeholder for token metadata?

Accepted Answer

{id}

Answer

{address}

Answer

{tokenName}

Answer

{owner}