Quiz 1.3 - How do transactions work on a blockchain?

Review and test your knowledge on How do transactions work on a blockchain? Exploring blockchain consensus mechanisms.

How does a transaction on a blockchain happen?

A) When the network reaches a consensus

B) When it has finished downloading the blockchain

C) When the block is full

D) When a single validator node approves it

What is proof-of-work?

A) A type of consensus mechanism in which miners compete to solve complex mathematical problems

B) A type of consensus mechanism in which nodes stake the network currency to validate transactions

C) A method of reaching consensus via a peer-to-peer network of nodes

D) None of the above

What is proof-of-stake?

A) A type of consensus mechanism in which miners compete to solve a complex mathematical problems

B) A type of consensus mechanism in which nodes stake the network currency to validate transactions

C) A method of reaching consensus via a peer-to-peer network of nodes

D) None of the above

What's one key reason why the XRPL uses a unique consensus algorithm?

A) It's easier to reverse transactions

B) It's more energy-efficient

C) Miners don't need to be paid as much

Why doesn't XRPL use PoW?

A) PoW uses a lot of energy

B) PoW is too slow

C) PoW isn't decentralized

D) Both A and B

E) All of the above