312-82덤프문제은행 - 312-82완벽한시험덤프공부
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312-82완벽한 시험덤프공부 - 312-82시험패스 가능한 인증덤프
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최신 Blockchain Fintech 312-82 무료샘플문제 (Q32-Q37):
질문 # 32
When using __________ the chain of ownership is established by a chain of digital signatures as each owner signs when transferring ownership.
정답：D
설명：
The UTXO (Unspent Transaction Output) model establishes a chain of ownership by using digital signatures.
In this model, each transaction consists of inputs (from previous UTXOs) and outputs (new UTXOs), and ownership is transferred by the current owner signing the transaction. This digital signature is then verified by the recipient, ensuring a secure and traceable chain of ownership.
Key Details:
Functionality of UTXO: UTXO is a fundamental part of Bitcoin's transaction model. When a transaction occurs, it consumes previous outputs as inputs, generating new UTXOs. Each UTXO can only be spent once, and ownership is verified through cryptographic signatures.
Chain of Ownership: The UTXO model inherently creates a clear and verifiable chain of ownership, as each output is signed by the current owner and used as input for future transactions, maintaining a continuous and transparent record of asset transfers.
Security through Digital Signatures: UTXO-based transactions rely on digital signatures to authenticate and authorize asset transfers, ensuring that only the rightful owner can initiate a transaction.
Thus, D. UTXO is the correct answer, as it accurately describes the model where ownership is established through a chain of digital signatures.
질문 # 33
Who first proposed blind signatures to build an untraceable digital currency?
정답：A
설명：
David Chaumfirst proposed the concept ofblind signaturesin the early 1980s as a way to create an untraceable digital currency. Chaum's work laid the groundwork for digital privacy in financial transactions by enabling transactions to be signed without revealing the actual content of the transaction, thus maintaining user privacy.
Key Details:
* Blind Signatures: A blind signature is a form of digital signature in which the content of a message is hidden (or "blinded") before being signed. This allows for privacy-preserving digital transactions, as the signer cannot see the actual content they are signing.
* Application in Digital Currency: Chaum's idea was foundational for the development of anonymous electronic cash systems. His work led to the creation of DigiCash in 1989, one of the earliest forms of digital currency focused on user privacy.
* Influence on Modern Cryptocurrencies: Although Chaum's DigiCash was not a blockchain-based system, his concepts of privacy and anonymous transactions greatly influenced the development of later cryptographic currencies and protocols, including Bitcoin.
Therefore,A. David Chaumis the correct answer, as he pioneered the use of blind signatures for anonymous digital currency.
질문 # 34
_________change the blockchain layout from a linearly sequential model.
정답：A
설명：
Tree Chainsmodify the standard blockchain structure from a linear sequence to a tree-like structure, where blocks can have multiple branches instead of forming a single sequential chain. This structure can improve scalability and enable parallel processing, as multiple chains can be validated simultaneously.
Key Details:
* Tree Structure: In tree chains, blocks can have multiple child blocks, which allows transactions to be processed across several branches concurrently. This reduces bottlenecks associated with linear block validation and enhances throughput.
* Benefits Over Linear Chains: Traditional blockchain models process blocks in a strict sequence. Tree chains allow for more flexibility and higher transaction throughput, as multiple blocks can be validated simultaneously across different branches.
* Use Cases: This structure is advantageous for complex applications that require parallel transaction processing, such as large-scale blockchain networks or systems needing high transaction speeds.
Thus,D. Tree chainsis the correct answer, as it refers to the blockchain model that diverges from a linear structure.
질문 # 35
A Type II DAPP is categorized by its______
정답：A
설명：
AType II DAppis a decentralized application that uses both the blockchain and protocol of aType I DApp.
Type I DApps are the foundational blockchain-based platforms, such as Ethereum, that operate with their own blockchain. Type II DApps build on these platforms, using the existing blockchain and protocol, but offering specific functionalities or services.
Key Details:
* Type I DApps: These are fundamental blockchain platforms, like Bitcoin or Ethereum, which have their own blockchain and provide a foundation for other applications.
* Characteristics of Type II DApps: Type II DApps leverage the infrastructure of Type I DApps but add additional functionality through smart contracts or protocols. For example, protocols such asERC-
20 tokensorERC-721 NFTsare built on Ethereum and utilize Ethereum's underlying blockchain and consensus protocol.
* Integration: By utilizing both the blockchain and protocol of a Type I DApp, Type II DApps inherit the security, decentralization, and features of the underlying Type I platform, which simplifies their development and ensures compatibility.
In summary,B. Using the blockchain and protocol of a type Iaccurately describes the categorization of Type II DApps.
질문 # 36
A____does not result in a new chain and does not require client nodes to upgrade.
정답：A
설명：
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.
질문 # 37
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