Exin BLOCKCHAINF Exam Questions Instant Access

Question 1

Which of the following statements sums up the Proof of Work consensus process?

AMiners complete to find a nonce results in a hash that starts with a predetermined number of leading zeros.

BMiners put up a stake. A miner is then selected based on stake value to add a new block to the chain. If a miner adds an invalid block to the chain, that miner loses their stake.

CAll nodes agree on the data of the transaction.

DMiners send assets to an inactive address. This process selects the next owner of a block.

Answer : C

Question 2

One solution to increasing Blockchain Transactions Per Second (TPS) is________.

Aadding more network nodes

Boff-chain transactions

Cusing faster microprocessors

Dfewer regulations

Answer : B

Question 3

Blockchains are being implemented in the food supply chain because_____________.

Aconsumers demand to know where their food comes from

Bit allows farm to table accountability for safety

Cthey have the potential to provide fast, specific supplier data

Dit prevents food waste if a food contamination problem occurs

EAll of the above

Answer : E

Question 4

How does a private Blockchain differ from a public one? Select all that apply.

AA private Blockchain does not use proof of work consensus

BA private Blockchain is more efficient and has faster transaction times

CA private Blockchain is not distributed

DA private Blockchain often requires the identity of users to be known

Answer : D

Question 5

Blockchain is faster and more efficient than a standard database.

ATrue

BFalse

Answer : B

Question 6

If a node on the network were to lose a copy of the ledger, the ledger is not lost. The large number of other nodes have a copy and won't lose track. This is known as___________.

ACensorship

BImmutability

CTransparency

DRedundancy

Answer : B

Question 7

Which Blockchain protocol uses Proof of Work Consensus? Select all that apply

AHyperledger

BCorda

CBitcoin

DEthereum

EAll of the above

Answer : A, C, D

Exin Blockchain Foundation BLOCKCHAINF Exam Questions