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How does a block connect to another?
a) Through the use of hash functions
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 minedd) Vitalik Buterin started the development of a new blockchain-based distributed computing platform called Ethereum
Blockchain technology can be used by a network of strangers who don’t trust each other by relying on a mix of:
b) Game theory and cryptography
What are the differences between Proof of Work and Proof of Stake consensus mechanisms? Choose all that apply.
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
What is a soft fork? Choose all that are correct.
b) Soft forks are upgrades to the network that are backward-compatible
d) Soft forks are considered “opt-in”
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
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