Download Certified Blockchain Business Foundations.CBBF.BrainDumps.2019-07-31.34q.vcex
| Vendor: | Blockchain |
| Exam Code: | CBBF |
| Exam Name: | Certified Blockchain Business Foundations |
| Date: | Jul 31, 2019 |
| File Size: | 17 KB |
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Demo Questions
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 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 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/ 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/ 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 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/ 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
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