Latest Reliable 312-82 Test Dumps–Pass 312-82 First Attempt
Latest Reliable 312-82 Test Dumps–Pass 312-82 First Attempt
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EC-COUNCIL EC-Council Blockchain Fintech CertificationB|FC exam Sample Questions (Q32-Q37):
NEW QUESTION # 32
The right to publish a new block is determined by ________
- A. Position in the blockchain
- B. Nodes proof of work
- C. Nod's current investment in the blockchain
- D. Transaction history
Answer: B
Explanation:
The right to publish a new block is commonly determined byProof of Work (PoW)in blockchain networks like Bitcoin. In PoW, network nodes, known as miners, compete to solve a cryptographic puzzle. The first node to successfully solve it gains the right to add a new block to the blockchain.
Key Details:
* Proof of Work Mechanism: Miners perform computational work to solve a hash puzzle, which proves that they have expended effort. This process ensures that blocks are added in a way that is resistant to tampering and fraud.
* Reward System: The miner who successfully publishes a new block receives a block reward (in Bitcoin, for example), incentivizing miners to participate in maintaining the blockchain network's security.
* Alternative Mechanisms: Other consensus mechanisms, such as Proof of Stake (PoS), do not rely on computational work but rather on a node's stake or investment in the blockchain. However, in the context of traditional blockchain models like Bitcoin, PoW is the primary method for determining block publication rights.
Therefore,A. Nodes proof of workis the correct answer, as PoW is the standard method by which nodes earn the right to publish new blocks in many blockchain networks.
NEW QUESTION # 33
Public blockchains most often use________ as a consensus mechanism.
- A. PoS
- B. PoB
- C. PoET
- D. PoW
Answer: D
Explanation:
Public blockchains most commonly useProof of Work (PoW)as their consensus mechanism, especially in well-established networks such as Bitcoin and, until recently, Ethereum. PoW is a protocol that relies on network participants (miners) solving complex mathematical problems to validate and add transactions to the blockchain. This process ensures the integrity and security of the network, as it requires substantial computational power and resources, making it difficult for any single entity to control the blockchain.
Key Details:
* Proof of Work (PoW): PoW, used primarily by Bitcoin, operates by having participants (often referred to as miners) compete to solve cryptographic puzzles. The first to solve the puzzle adds the next block of transactions to the blockchain and is rewarded with newly minted coins. This system is energy- intensive but is widely recognized for its security and resistance to tampering.
* Transition in Other Networks: While Ethereum initially used PoW, it transitioned toProof of Stake (PoS)in 2022 with Ethereum 2.0, due to PoS's lower energy requirements and increased scalability.
However, Bitcoin, the most prominent public blockchain, still relies on PoW.
* Other Consensus Mechanisms: Alternatives such asProof of Stake (PoS)andProof of Burn (PoB)are used by other blockchain networks that aim for different trade-offs in terms of energy efficiency, scalability, and security.Proof of Elapsed Time (PoET)is another mechanism mostly associated with permissioned (private) blockchains rather than public blockchains.
* Why PoW for Public Blockchains?: Public blockchains prioritize decentralization and security. PoW provides a robust way to achieve this, despite its high energy consumption. Its high level of security and historical success in Bitcoin's network often make it the go-to choice for public blockchains.
In summary, the dominance of PoW in public blockchains is due to its established security and proven track record, although PoS and other mechanisms are increasingly gaining popularity for their efficiency in newer blockchain projects.
NEW QUESTION # 34
In this method users permanently destroy a certain quantity of bitcoin in proportion to the quantity of altcoin to be demand. What is this method?
- A. Proof of Burn
- B. Side-chaining
- C. Proof of ownership
- D. Side block
Answer: A
Explanation:
Proof of Burn (PoB)is a consensus mechanism where users permanently destroy (or "burn") a certain quantity of copyright, such as Bitcoin, to gain the right to mine or acquire an altcoin. This process proves commitment to the network and secures it by effectively sacrificing one asset to obtain another.
Key Details:
* Burning Process: In PoB, participants send a certain amount of copyright to an unspendable address, effectively removing it from circulation. This act serves as proof that they have invested in the network by reducing the supply of the original copyright.
* Purpose and Use Cases: PoB is used by networks that want to incentivize long-term commitment and reduce total supply. It is often seen in new blockchain projects that allow miners or users to trade value in established currencies like Bitcoin for the native token of the new network.
* Security: By requiring participants to destroy value, PoB helps prevent spam attacks and promotes network stability.
Therefore,B. Proof of Burnis the correct answer, as it describes the method where users destroy a certain amount of copyright to receive or mine another asset.
NEW QUESTION # 35
A____does not result in a new chain and does not require client nodes to upgrade.
- A. Soft fork
- B. Hard fork
- C. Side chain
- D. Dependent chain
Answer: A
Explanation:
Asoft forkis a change to a blockchain protocol that is backward-compatible, meaning it does not result in the creation of a new chain and does not require all client nodes to upgrade. Nodes that do not upgrade can still participate in the network, although they may not have access to all new features introduced by the soft fork.
Key Details:
* Backward Compatibility: In a soft fork, updated nodes enforce the new rules, while non-updated nodes continue to follow the older protocol but remain part of the same blockchain. This contrasts with hard forks, where incompatibility leads to the creation of a new chain.
* Use Cases: Soft forks are commonly used to implement protocol upgrades or adjustments that do not fundamentally alter the structure of the blockchain, such as increasing block size limits or adding new features that are optional.
* Examples: An example of a soft fork is the Segregated Witness (SegWit) update on the Bitcoin blockchain, which was implemented to increase block capacity without splitting the chain.
Thus,B. Soft forkis the correct answer, as it refers to a backward-compatible update that does not require a new chain or mandatory upgrades from all nodes.
NEW QUESTION # 36
What is the primary benefit to patients of blockchain in the healthcare are industry?
- A. Total control over personal health records
- B. Improved medical outcomes
- C. Reduced costs
- D. Reduced wait times
Answer: A
Explanation:
The primary benefit of blockchain in the healthcare industry for patients istotal control over personal health records. Blockchain enables secure, decentralized storage of health data, allowing patients to control access to their information and share it with healthcare providers as needed.
Key Details:
* Data Ownership and Privacy: Blockchain gives patients the ability to own and manage their health records. They can grant or revoke access to different healthcare providers, ensuring that only authorized personnel have access to their data.
* Improved Security: Health records stored on a blockchain are encrypted and decentralized, making them resistant to tampering and unauthorized access. This enhances patient privacy and reduces the risk of data breaches.
* Interoperability and Accessibility: Blockchain facilitates seamless sharing of health records across different healthcare providers and systems, improving coordination and care continuity without compromising data integrity.
Therefore,B. Total control over personal health recordsis the correct answer, as it represents a significant advantage for patients in managing their healthcare information securely.
NEW QUESTION # 37
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