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NEW QUESTION # 39
_______is a word use to describe technologies which store, distribute and facilitate the exchange of value between users, either privately or publicly
Answer: A
Explanation:
Distributed Ledger Technology (DLT)is a broad term used to describe technologies that store, distribute, and facilitate the exchange of value between users, either privately or publicly. DLTencompasses various types of ledgers, including blockchains, where data is replicated, shared, and synchronized across a distributed network.
Key Details:
* Definition and Scope: DLT refers to a digital system for recording transactions across multiple locations simultaneously. It allows for decentralized data management and reduces the need for a central authority to maintain a ledger.
* Private and Public Ledgers: DLT can be implemented in both private (permissioned) and public (permissionless) networks. In public DLT, anyone can participate, while private DLT restricts access to authorized participants only.
* Examples of DLT: Blockchain is one form of DLT, but other types include Directed Acyclic Graphs (DAGs) and Hashgraph. Each of these has unique mechanisms for data storage and consensus.
Therefore,C. DLTis the correct answer, as it is the term that broadly covers technologies used for the exchange and storage of value in distributed systems.
NEW QUESTION # 40
Who first proposed blind signatures to build an untraceable digital currency?
Answer: A
Explanation:
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.
NEW QUESTION # 41
A________represents a transfer of value from one address to another, Transaction in a blockchain network can be defined also as a record of an event or the ''transfer of value from one account to another''
Answer: B
Explanation:
In blockchain terminology, atransactionrepresents the transfer of value from one address to another. Each transaction is recorded on the blockchain as an immutable entry, often representing a movement of digital assets or a record of an event.
Key Details:
* Nature of Transactions: A blockchain transaction involves a digital asset or token being sent from one blockchain address (wallet) to another. The transaction is broadcast to the network, validated by nodes, and then recorded on the blockchain ledger.
* Transfer of Value: Blockchain transactions serve as proof of the transfer of value, which could represent cryptocurrency movement, digital asset exchange, or a specific record of an event, depending on the blockchain's purpose.
* Inclusion in Blocks: Each transaction is grouped into blocks, which are then cryptographically linked together, forming the blockchain. This ensures all transactions are secure, traceable, and verifiable.
Thus,D. Transactionis the correct answer, as it describes the fundamental concept of transferring value on a blockchain.
NEW QUESTION # 42
These wallets store keys in a tree structure derived from a seed.
Answer: A
Explanation:
Hierarchical Deterministic (HD) Walletsare wallets that generate private and public keys in a tree structure, starting from a single seed phrase. This seed phrase can generate multiple key pairs, allowing users to back up and recover all their wallet addresses using one phrase, which enhances security and convenience.
Key Details:
* Tree Structure: HD wallets use a root seed to derive an entire hierarchy of keys. Each branch in the tree can create new sub-branches, generating separate addresses for different transactions without reusing them, which provides better privacy.
* Seed-Based Recovery: Users can restore all wallet addresses with the original seed phrase, making HD wallets more secure and easy to back up compared to non-deterministic wallets, which would require individual backups for each key.
* Compatibility with Blockchain Standards: HD wallets adhere to the BIP32 and BIP44 standards, which outline the derivation paths and formats used by these wallets. This compatibility allows for interoperability among different wallet providers.
In conclusion, Hierarchical Deterministic Wallets (answer B) best describes wallets that store keys in a tree structure derived from a seed.
NEW QUESTION # 43
______is a computer program that runs stop a blockchain and embedded within it are governance and business logic rules
Answer: B
Explanation:
Decentralized Applications (Dapps)are applications that run on a blockchain network and include embedded governance and business logic rules. Unlike traditional applications, Dapps are decentralized, meaning they operate on a peer-to-peer network rather than a centralized server, leveraging smart contracts to automatically enforce rules and protocols without intermediaries.
Key Details:
* Characteristics of Dapps: Dapps are open-source, operate autonomously, and store data on a blockchain. They utilize smart contracts to handle various functions, from transaction processing to enforcing governance rules and executing business logic.
* Smart Contracts: The embedded rules within Dapps are typically coded as smart contracts, which are self-executing contracts with the terms of the agreement directly written into lines of code. This ensures that all transactions and operations within the Dapp are transparent, immutable, and automatically enforced.
* Use Cases: Dapps are commonly found in areas such as decentralized finance (DeFi), gaming, supply chain management, and social media, offering users more control and transparency compared to traditional applications.
In conclusion,Dapps (A)is the correct answer as it refers to computer programs running on a blockchain with embedded governance and business logic rules.
NEW QUESTION # 44
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