NFT Skills 2

Question 1

Which Solidity visibility modifier should be used for a function that must only be callable from within the same contract or derived contracts?

Accepted Answer

internal

Answer

The internal modifier restricts a function to the contract itself and contracts that inherit from it.

Question 2

When implementing an ERC-721 contract, which function returns the metadata URI for a specific token?

Accepted Answer

tokenURI(uint256 tokenId)

Answer

tokenURI returns a string pointing to the JSON metadata associated with a given token ID.

Question 3

What is the primary purpose of using IPFS when developing NFTs?

Accepted Answer

To store metadata and assets in a decentralized, content-addressed way

Answer

IPFS provides decentralized, content-addressed storage so NFT assets and metadata are not tied to a single server.

Question 4

In Solidity, which keyword makes a function able to receive Ether?

Accepted Answer

payable

Answer

The payable modifier allows a function to accept Ether sent with the transaction.

Question 5

Which development framework provides a local Ethereum network, testing, and deployment scripts using JavaScript/TypeScript?

Accepted Answer

Hardhat

Answer

Hardhat is a popular development environment for compiling, testing, and deploying Ethereum smart contracts.

NFT Development Practice Test