CBBF 시험 - Blockchain실제시험문제와 답 - 70문항

Question No : 1

Blockchain allows for which of the following?

A.Anonymous Cryptography
B.Trust in central authorities
C.A fast and efficient ledger
D.A peer to peer ledger without the need of a third party

정답:
Explanation:
Reference: https://intellipaat.com/blog/what-is-blockchain-technology/

Question No : 2

In a private business Blockchain, transactions are endorsed by______________.

A.only relevant business participants
B.only the smart contract developer
C.all the nodes on the Blockchain
D.all participants with access to the network

정답:
Explanation:
Reference: https://developer.ibm.com/opentech/wp-content/uploads/sites/43/2017/08/BlockchainExplained-v4.06.AdaptedforBeirutConferenceAug2017-1.pdf (p.10)

Question No : 3

____________ledger technology is referred to as DLT.

A.Distributed
B.Decentralized
C.Database
D.All of the above
E.None of the above

정답:
Explanation:
Reference: https://cryptocurrencyfacts.com/what-is-distributed-ledger-technology-dlt/

Question No : 4

A Blockchain does NOT provide which attribute?

A.Security through distribution
B.Anonymity through cryptography
C.Fault Tolerance through distribution
D.Immutability through hashing

정답:

Question No : 5

Blockchain applications can provide____________________.

A.the elimination of intermediaries
B.building more trust between trusted parties
C.collaboration between trusted parties
D.better cooperation between banks

정답:

Question No : 6

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

A.adding more network nodes
B.off-chain transactions
C.using faster microprocessors
D.fewer regulations

정답:

Question No : 7

An asset is defined as ____________.

A.all records on a database
B.any data on the ledger
C.anything of value requiring accountability of ownership
D.any record on a private network

정답:

Question No : 8

Once a record is stored on the Blockchain ____________.

A.the record is moved to a secure server
B.the record is stored on a central node
C.it can be changed by an authorized person
D.the record is permanent

정답:
Explanation:
Reference can be changed by an authorized person

Question No : 9

One of the big issues that new financial transaction Blockchain solutions face is____________.

A.increasing the number of transactions per second (TPS)
B.the inability to find use cases
C.solving user identity
D.getting banks to cooperate

정답:
Explanation:
Reference: https://www.cnbc.com/2018/10/01/five-crucial-challenges-for-blockchain-to-overcomedeloitte.html

Question No : 10

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

A.Hyperledger
B.Corda
C.Bitcoin
D.Ethereum
E.All of the above

정답:

Question No : 11

The Ethereum Blockchain provides a/an _____________ virtual machine.

A.Windows compatible
B.energy efficient
C.Linux compatible
D.turing-complete

정답:
Explanation:
Reference: https://www.mycryptopedia.com/ethereum-virtual-machine-explained/

Question No : 12

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

A.Miners complete to find a nonce results in a hash that starts with a predetermined number of leading zeros.
B.Miners 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.
C.All nodes agree on the data of the transaction.
D.Miners send assets to an inactive address. This process selects the next owner of a block.

정답:
Explanation:
Reference: https://www.nichanank.com/blog/2018/5/23/consensus-algorithms-pow

Question No : 13

How is Blockchain benefiting voting?

A.By revealing the identity of each voter and who or what they voted for
B.By controlling who gets to vote
C.By only allowing a certain number of votes per person
D.By allowing voters to trust their vote has been counted

정답:

Question No : 14

Which item(s) make up a block header?

A.The hash of the Merkle root and the header of the previous block
B.The hash of every transaction in a specific block and the next block
C.The time stamp of the block and the genesis block hash
D.The hash of the previous block

정답:
Explanation:
Reference: https://www.cryptocompare.com/coins/guides/what-is-a-block-header-in-bitcoin/

Question No : 15

Which of the following are practical use cases for Blockchain?

A.Voting
B.A video sharing website
C.Medical records
D.Identity management
E.All of the above

정답:
Explanation:
Reference: https://www.mycryptopedia.com/16-promising-blockchain-use-cases/

Blockchain CBBF 시험