融资一千万，信不信由你
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What is a blockchain?
A distributed database that maintains a continuously growing list of ordered records called blocks
What is the most accurate description of a block?
A collection of transactions on a chain
What is a hash?
A fixed number of characters produced by an algorithm and used to secure blockchain transactions
Which of these statements about PoS is true?
Validators check transactions and add new blocks to the blockchain
How does the node infrastructure work?
It allows programs to use information from the blockchains faster
What is the main purpose of sharding?
Blockchain scalability
What is the purpose of a bridge?
Interoperability among blockchains
Which of these is not a blockchain?
Nansen
What is a smart contract?
A program that runs on a blockchain when predetermined terms and conditions are met
Which language is native for smart contracts development on Solana?
Rust
Which of these statements about Ethereum and Polygon are true?
Both are EVM compatible
Which tool allows smart contracts to monitor data from the real world?
Oracle
What is a DAO?
A smart contract/group of smart contracts describing organizations, their membership system, tokens, NFTs, and wallets governance
What’s the idea behind the “code is law” concept?
Code provides the rules for how broader society interacts in cyberspace
What can you not do with an NFT?
Use it as a stablecoin
What is an NFT marketplace?
A platform that makes it simple to trade and buy NFTs and see their ownership
What is a whitelist?
A list of wallets or contract addresses that will receive digital assets or tokens
Which of these is a standard for collections of unique NFTs?
ERC-721
Which standard combines the functions of ERC-20 and ERC-721?
ERC-1155
What is minting?
The process of creating a new NFT on chain
What is a token?
An asset built on an existing blockchain using smart contracts
How much do you need to pay for a transaction, assuming that the transaction sent to Ethereum requires 21 000 gas and 1 gas costs 3 Gwei?
0,000063 ETH What is Wrapped Bitcoin (WBTC)?
A token
Which of these is a stablecoin?
DAI
Which of these is a real on-chain market indicator?
Coin Days Destroyed
Why is the Howey test important for crypto?
It determines whether a cryptocurrency transaction qualifies as an "investment contract" and is therefore subject to U.S. securities laws, meaning it will be highly regulated
Who has the keys to a non-custodial wallet?
The users themselves keep both public and private keys
What is the safest private key storage?
Hardware wallet
What is the main trade-off for having a non-custodial wallet?
It is impossible to recover digital assets if a private key is compromised
What problem does Gnosis Safe solve?
Security of digital assets if a private key is lost
What wallet address is compatible with Ethereum?
0xc098b2a3aa256d2140208c3de6543aaef5cd3a94