Eccouncil EC-Council Blockchain Fintech Certification (BFC) 312-82 Exam Questions

Answer : B

A Type II DApp is a decentralized application that uses both the blockchain and protocol of a Type 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 as ERC-20 tokens or ERC-721 NFTs are 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 I accurately describes the categorization of Type II DApps.

Answer : D

In blockchain terminology, a transaction represents 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. Transaction is the correct answer, as it describes the fundamental concept of transferring value on a blockchain.

Answer : D

Tokenization is the process of converting rights to an asset into a digital representation on a blockchain. This process allows assets like real estate, art, or securities to be represented as digital tokens that can be traded or transferred on a blockchain.

Key Details:

Digital Representation of Assets: Tokenization involves creating digital tokens on a blockchain that represent ownership or rights to a real-world asset. These tokens can be transferred and traded much like traditional assets.

Advantages of Tokenization: By enabling fractional ownership, tokenization lowers barriers to investment and improves liquidity. It also provides transparency and traceability in asset transactions.

Use Cases: Tokenization is widely used in real estate, art, and securities, as it facilitates easy transfer, enhances liquidity, and enables global access to traditionally illiquid assets.

Thus, D. Tokenization is the correct answer, as it describes the process of converting asset rights into a digital form on a blockchain.

Answer : A

Augur is a decentralized, blockchain-based predictions market built on the Ethereum network. It enables users to create and participate in markets based on the outcome of real-world events, using smart contracts to automate the process and secure transactions.

Key Details:

Ethereum-Based: Augur utilizes the Ethereum blockchain to facilitate the creation and settlement of prediction markets. It leverages Ethereum's smart contracts to ensure transparency, immutability, and trustless interactions.

Decentralized Prediction Market: In Augur, users can bet on the outcome of various events, ranging from sports to elections. The decentralized nature of the platform ensures that no central authority controls the markets, providing a level of censorship resistance.

Token Usage: Augur uses a token called REP (Reputation) that holders use to report and dispute outcomes of events on the platform. This ensures that the market outcomes are validated in a decentralized manner.

Thus, A. Augur is the correct answer, as it is a blockchain-based prediction market built on Ethereum.

Answer : A

Proof of Elapsed Time (PoET) is a consensus mechanism that uses a Trusted Execution Environment (TEE) to ensure randomness and safety in the leader election process by enforcing a guaranteed wait time. Developed by Intel, PoET is particularly used in permissioned blockchain networks where a TEE can securely run code to determine which node is elected to propose the next block. This mechanism is efficient in terms of energy consumption and provides a fair method for selecting a leader without requiring intensive computational power.

Key Details:

Role of TEE in PoET: The TEE ensures that nodes wait for a random period before being eligible to propose a new block. This waiting period is verified by the TEE, which acts as a trusted third party to confirm that nodes have adhered to the assigned wait time.

Randomness and Security: PoET provides randomness in the leader selection process, reducing the chances of any node gaining an unfair advantage. It also promotes security by leveraging the TEE, which is designed to prevent tampering with the waiting time calculations.

Use Cases: PoET is mainly used in permissioned blockchain environments like Hyperledger Sawtooth, where nodes are pre-approved, and there is a need for a scalable yet secure consensus mechanism.

In summary, PoET is the correct answer as it directly refers to a consensus mechanism that utilizes a Trusted Execution Environment for leader election.

Answer : C, D

In Ethereum, there are two main types of transactions: Message Call and Contract Creation. These transaction types enable Ethereum to support both the execution of contracts and interactions between accounts.

Key Details:

Message Call Transactions: These transactions involve interactions between externally owned accounts (EOAs) or between EOAs and smart contracts. Message calls are used to transfer Ether or invoke functions within existing smart contracts.

Contract Creation Transactions: This transaction type is used specifically to deploy new smart contracts on the Ethereum blockchain. During a contract creation transaction, the code for the new contract is included, which the network processes and stores at a unique address.

Exclusion of User Transactions: While ''User'' refers to EOAs, it is not a type of transaction itself in Ethereum. Transactions in Ethereum are categorized based on their purpose -- either calling an existing contract (Message Call) or creating a new one (Contract Creation).

Thus, C. Message Call and D. Contract Creation are the correct answers, as they represent the two main transaction types in Ethereum.

Answer : A, D

According to studies conducted by Deloitte and other industry research, blockchain offers several benefits for the insurance industry, particularly in more efficient claims processing and lower costs. Blockchain's capabilities in data immutability, transparency, and automation play key roles in streamlining insurance processes and reducing operational expenses.

Key Details:

Efficient Claims Processing: Blockchain enables quicker verification and processing of claims by automating workflows through smart contracts. This reduces paperwork, minimizes errors, and speeds up the claims process, improving customer satisfaction.

Lower Costs: By reducing intermediaries and leveraging automation, blockchain lowers administrative costs. It minimizes the need for manual verification and fraud detection, which traditionally consume significant resources in the insurance industry.

Transparency and Fraud Reduction: Blockchain provides an immutable and transparent record of all transactions. This helps prevent fraud, as all stakeholders have access to the same data, reducing discrepancies and the need for extensive audits.

In conclusion, A. More efficient claims processing and D. Lower costs are the correct answers, as these are key benefits of blockchain for the insurance industry identified in Deloitte's research.