Blockchain Basics Week 4 Quiz Answer
Week 4
Trust Essentials
Week 4 ---- Quiz 1 Answers
Question 1)
Trust in a decentralized blockchain is about __.
- securing the chain using specific protocols.
- executing and confirming the transactions.
- validating the transactions and blocks for tamper proofing.
- All of the above
Question 2)
Miners execute the transactions for Ether transfers but are not responsible for the execution of smart contracts. True or False?
- True
- False
Question 3)
Proof of work is the __ used by Bitcoin blockchain and Ethereum Byzantium Metropolis blockchain.
- Incentive function
- Trust function
- Transaction confirmation
- Consensus Protocol
Question 4)
An approach for consensus protocol that is hotly debated among developers of blockchain is
- Round Robin
- Proof of Age
- Proof of Stake
- Proof of Incentive
Week 4 ---- Quiz 2 Answers
Question 1)
What happens if more than one miner solves the consensus puzzle very close in time to each other in Ethereum?
- Runner-up miners leave the network.
- Small incentives are given to runner-up blocks
- The new block is added to the main chain and not the runner-up chain
- Small incentives are given to the runner up blocks and the new block is added to the main chain
Question 2)
Double spending is reusing digital assets intentionally or inadvertently. True or False?
- True
- False
Question 3)
In Ethereum, a combination of account number and the global nonce is used to address issues regarding double-spending. True or False?
- True
- False
Week 4 ---- Quiz 3 Answers
Question 1)
Bootstrapping the new software to the already running processes is known as.
- Hashing
- Hard Forks
- Scripting
- Soft Forks
Question 2)
After a hard fork, the emerging two chains are incompatible. True or False?
- True
- False
Question 3)
Bitcoin blockchain implemented a soft fork to realize a __.
- P2SH Peer-to-Shell feature
- P2SH conditional payment script feature
- Split into Bitcoin core and Bitcoin cash
- P2SH payer gossip feature
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