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WorksheetsFinTech 22-1 DeFi
Total questions: 9
Worksheet time: 11mins
What were the objectives of DeFi day 1?
Build non-fungible ERC721 tokens with OpenZeppelin.
Implement a given smart contract specification into real solidity code.
Use Filters in Web3.py to react to Events from smart contracts.
Use IPFS to store immutable data off-chain to save gas.
Which best describes the ERC 721 standard?
It's a non-fungible token standard.
It's a fungible token standard.
It improves the security of token transfers.
It reduces the amount of gas needed for contracts.
We need to import a safe math counter to track how many tokens have been issued.
True
False, we don't need to use safe math for counters.
False, we use counters for tracking minting, not balances.
False, we don't need a counter for anything.
What is something an event allows us to do?
Connect to cloud services.
Save gas on data storage.
Host decentralized app interfaces.
Store larger data off-chain in a decentralized location.
Which are true of the struct data structure?
It allows you to create new dynamic data structures.
It's basically the same thing as a mapping.
It allows you to create data structures that contain multiple types.
It allows you to create objects.
What is the InterPlanetary Filesystem (IPFS)?
A Protocol
A Server
A Network
A Filesystem
Project 3 must be about blockchain.
True
False
How was DeFi day 1 for you?
Any suggestions?
