Blockchain Developer Token Standards and NFTs 4

Question 1

What is the purpose of the ERC-2981 standard?

Accepted Answer

NFT royalty information

Answer

Token bridging

Answer

Gasless transfers

Answer

Vault accounting

Question 2

Does ERC-2981 enforce that royalties are actually paid?

Accepted Answer

No, it only signals the amount; payment is up to the marketplace

Answer

Yes, on every transfer

Answer

Yes, at mint time

Answer

Only on burns

Question 3

In ERC-721, what does safeTransferFrom add over transferFrom?

Accepted Answer

A check that contract recipients implement onERC721Received

Answer

Lower gas

Answer

Automatic minting

Answer

Royalty payment

Question 4

What does setApprovalForAll(operator, true) do in ERC-721?

Accepted Answer

Authorizes an operator to manage all of the caller's tokens

Answer

Burns all tokens

Answer

Transfers ownership of the contract

Answer

Sets the token URI

Question 5

Which approach reduces gas when minting many NFTs by tracking ownership across ID ranges?

Accepted Answer

ERC-721A batch minting

Answer

ERC-20 minting

Answer

ERC-165 detection

Answer

ERC-2612 permit

Question 6

What is 'lazy minting' in NFT systems?

Accepted Answer

Deferring on-chain mint until first purchase, with the buyer paying gas

Answer

Minting only odd token IDs

Answer

Minting without metadata

Answer

Minting only to the deployer

Question 7

Why is on-chain enforcement of NFT royalties difficult on standard ERC-721 transfers?

Accepted Answer

transferFrom cannot distinguish a sale from a gift and carries no payment

Answer

Transfers are free

Answer

NFTs cannot be sold

Answer

Royalties are stored off-chain only