BLOCKCHAINF : EXIN Blockchain Foundation Certification Exam

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Exin
BLOCKCHAINF
EXIN Blockchain Foundation Certification
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Question: 16
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
Answer: D
Question: 17
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.
Answer: C
Question: 18
The Ethereum Blockchain provides a/an virtual machine.
A. Windows compatible
B. energy efficient
C. Linux compatible
D. turing-complete
Answer: D
Question: 19
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
Answer: A,C,D
Question: 20
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
Answer: A
Question: 21
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
Answer: D
Explanation:
Reference can be changed by an authorized person
Question: 22
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
Answer: C
Question: 23
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
Answer: B
Question: 24
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
Answer: A
Question: 25
A Blockchain does NOT provide which attribute?
A. Security through distribution
B. Anonymity through cryptography
C. Fault Tolerance through distribution
D. Immutability through hashing
Answer: B
Question: 26
ledger technology is referred to as DLT.
A. Distributed
B. Decentralized
C. Database
D. All of the above
E. None of the above
Answer: A
Question: 27
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
Answer: A
Question: 28
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
Answer: D
Question: 29
Smart Contracts DO NOT provide __________ .
A. Authority
B. Anonymity
C. Efficiency
D. Accuracy
Answer: B
Question: 30
The transaction hash contained in a block is the __________ .
A. unique number to show itās a Bitcoin block
B. same as the user private key
C. digital fingerprint of the block
D. metadata used for ID
Answer: C

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