# superdao 测试答案

By [imayday.eth](https://paragraph.com/@imayday) · 2022-11-30

---

**What is a blockchain?**

A distributed database that maintains a continuously growing list of ordered records called blocks

**What is a hash?**

A fixed number of characters produced by an algorithm and used to secure blockchain transactions

**What is the most accurate description of a block?** 

A collection of transactions on a chain

**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 tool allows smart contracts to monitor data from the real world?**

Oracle

**Which of these statements about Ethereum and Polygon are true?**

Both are EVM compatible

**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

欢迎关注我的推：

---

*Originally published on [imayday.eth](https://paragraph.com/@imayday/superdao)*