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What type of DApp uses another blockchain such as Ethereum?
A Type II DApp is characterized by utilizing another blockchain, such as Ethereum, as its underlying platform. Type II DApps generally operate as protocols or platforms themselves and rely on a foundational blockchain (Type I) for their infrastructure. This categorization enables Type II DApps to leverage the security, decentralization, and functionality of the underlying blockchain while adding unique features or protocols.
Key Details:
Relationship with Type I DApps: Type I DApps are foundational platforms with their own blockchain, such as Ethereum. Type II DApps are built on these foundational platforms, creating additional protocols or applications that depend on the Type I blockchain.
Examples of Type II DApps: Protocols like the ERC-20 token standard on Ethereum are examples of Type II DApps, as they rely on Ethereum's blockchain but provide their own set of functionalities that can be used by other applications.
Benefits of Using Existing Blockchains: By using established blockchains, Type II DApps benefit from existing infrastructure and security while extending the blockchain's capabilities.
Therefore, C. Type II is the correct answer, as it represents DApps built on another blockchain like Ethereum.
______is designed to allow easy deployment of bloodchains.
Hyperledger Cello is designed to facilitate the deployment and management of blockchain networks. It provides an easy-to-use framework for creating, managing, and scaling blockchain networks, making it suitable for rapid deployment and operation. Although the term 'bloodchains' might be a typo or intended for 'blockchains,' Cello indeed simplifies the blockchain setup process for various applications.
Key Details:
Deployment and Management: Cello offers a suite of tools that automates blockchain deployment, operation, and monitoring, making it accessible for businesses looking to adopt blockchain technology with minimal effort.
Modular Approach: It supports various blockchain frameworks, including Hyperledger Fabric, and is aimed at reducing the complexity involved in blockchain management.
Use Cases: Hyperledger Cello is useful for enterprise blockchain applications, as it allows administrators to manage blockchain networks with tools that support configuration, monitoring, and scaling.
Thus, B. Cello is the correct answer, as it simplifies blockchain deployment and management.
Who first proposed blind signatures to build an untraceable digital currency?
David Chaum first proposed the concept of blind signatures in 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 Chaum is the correct answer, as he pioneered the use of blind signatures for anonymous digital currency.
_______is a word use to describe technologies which store, distribute and facilitate the exchange of value between users, either privately or publicly
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. DLT encompasses 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. DLT is the correct answer, as it is the term that broadly covers technologies used for the exchange and storage of value in distributed systems.
________is used to split up the tasks into multiple chunks that are then processed by multiple nodes.
Sharding is a scalability technique that splits tasks or data into smaller, more manageable pieces called 'shards.' These shards are then processed in parallel by multiple nodes in a network. By dividing the workload, sharding can significantly enhance the efficiency and speed of blockchain networks, which is especially beneficial for handling large transaction volumes and complex computations.
Key Details:
Purpose of Sharding: The main goal of sharding is to address blockchain scalability issues. By enabling the network to process transactions and data in parallel, it reduces the load on individual nodes, thus increasing the overall throughput of the blockchain.
How Sharding Works: In a sharded blockchain, each node only needs to process a portion of the total data rather than every single transaction on the network. Each shard is responsible for a subset of data and transactions, and only nodes within a particular shard need to validate its transactions.
Relevance in Blockchain: Sharding is crucial in large-scale blockchain networks like Ethereum, where high transaction volumes can lead to congestion. Ethereum 2.0, for example, incorporates sharding as a core feature to improve its scalability and transaction processing capacity.
Sharding is, therefore, the correct answer, as it directly refers to the method of dividing tasks for parallel processing in a distributed environment.
