@CanalQb

Aprenda e Ganhe - Binance - Blockchain Fundamentals


CanalQb


Sempre crie uma frase de segurança única para jogos, Airdrops e qualquer outra coisa de origem desconhecida, em vez de usar sua carteira principal.




Module 1: Introduction to blockchain technology

How does a block connect to another?
a) Through the use of hash functions
b) Through the use of a private network
c) They are connected by the blockchain administrators
d) Through centralized servers
e) None of the above

Module 2: Brief history of blockchain technology

Which of the following statements is/are correct? Choose all that apply.
a) The idea behind blockchain technology was described as early as the 1990s
b) In January 2009, Bitcoin came to existence when the first Bitcoin block was mined
c) Satoshi Nakamoto received a reward of 50 bitcoins when the first Bitcoin block was mined
d) Vitalik Buterin started the development of a new blockchain-based distributed computing platform called Ethereum

Module 3: How does blockchain work

Blockchain technology can be used by a network of strangers who don’t trust each other by relying on a mix of:
a) Cryptography and distributed ledger
b) Game theory and cryptography
c) Public-key cryptography and interception
d) Game theory and private key


Module 4: Blockchain consensus mechanisms: PoW and PoS

What are the differences between Proof of Work and Proof of Stake consensus mechanisms? Choose all that apply.
a) Proof of Work is secure while Proof of Stake is not
b) Proof of Work requires expensive equipment and high energy costs; while Proof of Stake doesn’t
c) Proof of Stake selects validators pseudo-randomly, while nodes compete to solve a block in Proof of Work
d) Proof of Stake requires validators to hold and stake the native cryptocurrency, while Proof of Work doesn’t

Module 5: Blockchain network structure: nodes and forks

What is a soft fork? Choose all that are correct.
a) Soft forks are upgrades to the network that makes older nodes obsolete
b) Soft forks are upgrades to the network that are backward-compatible
c) Soft forks are considered “opt-out”
d) Soft forks are considered “opt-in”


Module 6: Blockchain use cases and limitations

Which of the following statements is/are correct? Choose all that apply.
a) Sending money via blockchain can be fast, and incur low fees
b) DeFi aims to create a more open, inclusive, decentralized and transparent financial system
c) Blockchain can make supply chain interactions between businesses smoother and more efficient
d) Blockchain is not a good option for storing digital health records