What is a blockchain quiz

Question 1

What links each block to the previous one in a blockchain?

Accepted Answer

The hash of the previous block stored in the new block's header

Question 2

What does a full node do?

Accepted Answer

It stores the whole chain and independently verifies every transaction and block

Question 3

What is the purpose of a consensus mechanism?

Accepted Answer

To decide which new block is added and make cheating expensive

Question 4

Which statement about blockchain limitations is correct?

Accepted Answer

Blockchains trade throughput for decentralization and cannot verify real world truth

Question 5

What happens if someone edits a transaction in an old block?

Accepted Answer

The block's hash changes and the chain breaks on everyone else's copy

What is a blockchain: the quiz