Skills 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 Skills flashcards as text
Which Solidity visibility modifier should be used for a function that must only be callable from within the same contract or derived contracts?
Answer: internal
The internal modifier restricts a function to the contract itself and contracts that inherit from it.
When implementing an ERC-721 contract, which function returns the metadata URI for a specific token?
Answer: tokenURI(uint256 tokenId)
tokenURI returns a string pointing to the JSON metadata associated with a given token ID.
What is the primary purpose of using IPFS when developing NFTs?
Answer: To store metadata and assets in a decentralized, content-addressed way
IPFS provides decentralized, content-addressed storage so NFT assets and metadata are not tied to a single server.
In Solidity, which keyword makes a function able to receive Ether?
Answer: payable
The payable modifier allows a function to accept Ether sent with the transaction.
Which development framework provides a local Ethereum network, testing, and deployment scripts using JavaScript/TypeScript?
Answer: Hardhat
Hardhat is a popular development environment for compiling, testing, and deploying Ethereum smart contracts.
What does the OpenZeppelin library primarily provide for NFT developers?
Answer: Audited, reusable smart contract implementations and standards
OpenZeppelin offers community-audited contract templates such as ERC-721 and ERC-1155 to build on safely.
Why is it important to emit events like Transfer in an NFT contract?
Answer: Events allow off-chain applications to track on-chain state changes
Events provide an indexed log that front-ends and indexers use to monitor token transfers and ownership changes.