Ethereum Quiz

1. What is the primary programming language used to write smart contracts on Ethereum?

  • A) Python
  • B) JavaScript
  • C) Solidity
  • D) Rust

2. Who co-founded Ethereum along with Vitalik Buterin?

  • A) Charlie Lee
  • B) Gavin Wood
  • C) Andreas Antonopoulos
  • D) Roger Ver

3. What is the Ethereum Virtual Machine (EVM)?

  • A) A decentralized exchange
  • B) A blockchain protocol
  • C) A runtime environment for executing smart contracts
  • D) A cryptocurrency wallet

4. What is an Ethereum Improvement Proposal (EIP)?

  • A) A new cryptocurrency
  • B) A proposal for network upgrades
  • C) A type of smart contract
  • D) A new consensus mechanism

5. What is the role of Ether (ETH) in the Ethereum network?

  • A) Governance token
  • B) Utility token for transactions and gas fees
  • C) Identity token
  • D) Voting token

6. What does the term "gas" refer to in Ethereum?

  • A) A type of transaction fee
  • B) A smart contract
  • C) A new consensus algorithm
  • D) A data storage system

7. What is the maximum number of Ether that can exist?

  • A) 21 million
  • B) 1 billion
  • C) Unlimited
  • D) 100 million

8. What is the purpose of a smart contract on the Ethereum network?

  • A) To provide liquidity
  • B) To facilitate and enforce automated agreements
  • C) To store large amounts of data
  • D) To mine new Ether

9. What is the main difference between Ethereum and Ethereum Classic?

  • A) Consensus mechanism
  • B) Maximum supply of Ether
  • C) Ethereum Classic is a result of a split from Ethereum due to disagreements on handling a hack
  • D) Ethereum Classic uses a different programming language

10. What upgrade is Ethereum undergoing to improve scalability and reduce gas fees?

  • A) Ethereum 2.0
  • B) Constantinople
  • C) Istanbul
  • D) Metropolis

11. What is the main purpose of the “proof-of-stake” consensus mechanism in Ethereum 2.0?

  • A) To replace miners with validators who are chosen based on their stake
  • B) To increase the block size limit
  • C) To add new transaction types
  • D) To provide faster block confirmation times

12. What is a decentralized application (DApp) in the context of Ethereum?

  • A) An application that operates on a centralized server
  • B) An application that runs on the Ethereum blockchain and is decentralized
  • C) A tool for managing Ethereum wallets
  • D) A cryptocurrency exchange platform

13. What is the purpose of the “ERC-20” standard in Ethereum?

  • A) To define a standard for creating and issuing tokens
  • B) To specify a protocol for cross-chain transactions
  • C) To establish new types of smart contracts
  • D) To improve transaction speed

14. What is a "smart contract" in Ethereum?

  • A) A contract for physical goods
  • B) A digital agreement that self-executes based on predefined rules
  • C) A document written in legal jargon
  • D) A type of Ether transaction

15. What does “staking” involve in the context of Ethereum 2.0?

  • A) Holding Ether to earn rewards and participate in network consensus
  • B) Mining Ether with computational power
  • C) Trading Ether on exchanges
  • D) Creating new tokens

16. What is a “fork” in the context of blockchain technology?

  • A) A blockchain upgrade or change
  • B) A new type of cryptocurrency
  • C) A transaction fee
  • D) A software error

17. What is a “Decentralized Autonomous Organization” (DAO) in Ethereum?

  • A) A decentralized platform for exchanging cryptocurrencies
  • B) An organization governed by smart contracts with no central authority
  • C) A decentralized cloud storage system
  • D) A tool for creating tokens

18. What does the “DAO hack” refer to?

  • A) A hack into the Ethereum blockchain
  • B) A breach of a third-party application using Ethereum
  • C) An exploit of a vulnerability in the DAO that led to a significant loss of Ether
  • D) A malfunction in the Ethereum network protocol

19. What is the role of “miners” in Ethereum’s current Proof of Work (PoW) system?

  • A) To create new Ether and validate transactions
  • B) To stake Ether for rewards
  • C) To create smart contracts
  • D) To manage Ethereum's governance

20. How does Ethereum achieve decentralization?

  • A) Through a centralized server
  • B) By using a single data center
  • C) By distributing data across a network of nodes
  • D) By storing data on a single blockchain