Free Download CBBF Examp Dump: Blockchain.CBBF.PracticeTest.2019-08-14.34q.vcex

Question 1

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

A private Blockchain does not use proof of work consensus
A private Blockchain is more efficient and has faster transaction times
A private Blockchain is not distributed
A private Blockchain often requires the identity of users to be known

Correct answer: D

Explanation:

Reference: https://medium.com/coinmonks/public-vs-private-blockchain-in-a-nutshell-c9fe284fa39f

Question 2

A distributed network is always decentralized.

True
False

Correct answer: B

Explanation:

Reference: https://stackoverflow.com/questions/49195562/difference-between-a-distributed-and-a-decentralized-network

Question 3

Which of the following are practical use cases for Blockchain?

Voting
A video sharing website
Medical records
Identity management
All of the above

Correct answer: E

Explanation:

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

Question 4

Which item(s) make up a block header?

The hash of the Merkle root and the header of the previous block
The hash of every transaction in a specific block and the next block
The time stamp of the block and the genesis block hash
The hash of the previous block

Correct answer: D

Explanation:

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

Question 5

How is Blockchain benefiting voting?

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

Correct answer: D

Question 6

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

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

Correct answer: C

Explanation:

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

Question 7

The Ethereum Blockchain provides a/an _____________ virtual machine.

Windows compatible
energy efficient
Linux compatible
turing-complete

Correct answer: D

Explanation:

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

Question 8

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

Hyperledger
Corda
Bitcoin
Ethereum
All of the above

Correct answer: ACD

Question 9

Blockchain applications can provide____________________.

the elimination of intermediaries
building more trust between trusted parties
collaboration between trusted parties
better cooperation between banks

Correct answer: A

Question 10

A Blockchain does NOT provide which attribute?

Security through distribution
Anonymity through cryptography
Fault Tolerance through distribution
Immutability through hashing

Correct answer: B

Exam	Certified Blockchain Business Foundations
Number	CBBF
File Name	Blockchain.CBBF.PracticeTest.2019-08-14.34q.vcex
Size	16 KB
Posted	Aug 14, 2019
Download	Blockchain.CBBF.PracticeTest.2019-08-14.34q.vcex

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