NFT ERC-721 vs. ERC-1155 Standards 5

Question 1

Which royalty standard is commonly added on top of both ERC-721 and ERC-1155?

Accepted Answer

ERC-2981

Answer

ERC-2981 provides a standard royaltyInfo interface usable with both NFT standards.

Question 2

In ERC-1155 safe transfers, what extra parameter is passed compared to ERC-721's basic transfer?

Accepted Answer

An amount (value) for the token ID

Answer

ERC-1155 transfers include an amount because IDs can be fungible with quantities.

Question 3

What is a practical gas advantage of ERC-1155 when airdropping many items to many users?

Accepted Answer

Batch transfers reduce overhead versus many individual ERC-721 transfers

Answer

Batching multiple IDs and amounts in one call cuts repeated per-transaction overhead.

Question 4

Which statement about token uniqueness is correct?

Accepted Answer

ERC-721 enforces one owner per token ID, while ERC-1155 IDs can have many holders

Answer

ERC-721 IDs are singular and singly owned; ERC-1155 IDs can be held by many addresses in varying amounts.

Question 5

When migrating a collection from ERC-721 to ERC-1155, what is a common challenge?

Accepted Answer

Marketplace compatibility and mapping unique tokens to ID/amount semantics

Answer

Differing transfer/approval semantics and marketplace support require careful mapping during migration.

NFT Development Practice Test