ECCouncil EC-Council Blockchain Fintech Certification B|FC exam 312-82 Exam Dumps: Updated Questions & Answers (October 2025)

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.

Proof of Work (PoW)algorithms are primarily used to demonstrate that sufficient computational resources have been expended by a participant to validate transactions and add them to the blockchain. In PoW, miners compete to solve a cryptographic puzzle, which requires significant computational power. This effort helps secure the network by making it prohibitively expensive for any individual or group to alter the blockchain's history.

Key Details:

Mechanism of PoW: The essence of PoW is to prove that a certain amount of computational work has been performed. This “work” is measured by the effort miners invest in solving the cryptographic puzzle. The process requires miners to find a nonce that, when hashed with the block’s data, results in a hash that meets the network's difficulty requirements.

Security and Integrity: By proving computational work, PoW ensures that miners cannot simply fabricate or alter transactions without a significant investment of resources. This mechanism deters attacks and makes blockchain networks resistant to tampering and double-spending.

Association with Bitcoin Mining: Although PoW is often associated with Bitcoin mining (as miners expend computational resources to validate and record transactions), its broader purpose is to establish a cost for participation in the network, ensuring that all entries to the blockchain are trustworthy and secure.

Therefore, PoW is best described as a mechanism for proving that adequate computational resources have been expended, aligning with the correct answer B.

Tokenizationis 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. Tokenizationis the correct answer, as it describes the process of converting asset rights into a digital form on a blockchain.

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.

According to ConsenSys, blockchain offers various benefits for finance, includingstreamlined processesandaccess to international markets. These benefits enable financial institutions to operate more efficiently and expand their services globally.

Key Details:

Streamlined Processes: Blockchain eliminates intermediaries, automates workflows through smart contracts, and reduces paperwork, resulting in faster and more efficient financial transactions and record-keeping.

Access to International Markets: Blockchain facilitates cross-border transactions and reduces the barriers associated with currency exchange and international settlements, allowing financial institutions to expand their reach and provide services to a global audience.

Operational Efficiency: By automating and digitizing various financial processes, blockchain reduces costs, enhances accuracy, and simplifies compliance, making it easier for financial institutions to operate internationally.

Therefore,C. Streamlined processesandD. Access to international marketsare the correct answers, as these align with the benefits of blockchain for finance according to ConsenSys.

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.

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.

Hyperledger Fabricis a widely used enterprise blockchain framework developed under the Linux Foundation's Hyperledger project. It is designed to support various industries by offering a modular architecture, which enables enterprises to create customized blockchain solutions that meet specific business requirements.

Key Details:

Enterprise Application: Hyperledger Fabric is suitable for use cases requiring privacy and confidentiality, such as supply chain management, healthcare, and finance. It supports permissioned networks where only authorized participants can join.

Modularity and Flexibility: Fabric's modular design allows organizations to plug in their preferred components for consensus, membership, and data storage. This makes it versatile across different industries and applications.

Smart Contracts and Chaincode: Fabric supports smart contracts, called chaincode, which enable complex business logic to be executed on the blockchain, providing significant utility to enterprises.

As a result,A. Hyperledger Fabricis the correct answer, as it is a leading enterprise blockchain framework used across multiple sectors.

Ethereumcurrently supports a transaction throughput of approximately10-14 transactions per second (TPS). This transaction speed is a result of Ethereum’s design, which balances decentralization and security, albeit at the cost of scalability. This TPS rate is consistent across the Ethereum network prior to its upgrade to Ethereum 2.0, which aims to increase scalability through sharding and Proof of Stake.

Key Details:

Limitations of Current Throughput: Ethereum’s TPS rate is due to limitations in its consensus mechanism (formerly Proof of Work, now Proof of Stake) and block size, which prioritize security over transaction speed.

Comparison with Other Networks: Bitcoin, for example, supports around 3-7 TPS, while other networks like Solana or Binance Smart Chain support significantly higher TPS. Ethereum’s TPS may increase as Ethereum 2.0 is fully implemented, which aims to improve its scalability.

Impact on Decentralized Applications (DApps): Ethereum’s transaction capacity impacts DApps running on the network, as higher usage can lead to congestion and increased transaction fees(gas fees). The upcoming upgrades are intended to alleviate these issues and enhance performance.

Therefore,D. Ethereumis the correct answer, as it supports approximately 10-14 TPS in its current form.

Ahard forkoccurs when there is a fundamental change in a blockchain’s protocol, resulting in the creation of a new chain that is incompatible with the previous one. After a hard fork, nodes must upgrade to the new version of the blockchain’s software to continue participating in the network. A hard fork can be used to implement new features, fix security issues, or change core aspects of the blockchain.

Key Details:

Differences from Soft Forks: Unlike a soft fork, which is backward-compatible and allows nodes on the previous version to still participate, a hard fork splits the blockchain into two distinct paths, with the upgraded path requiring new software.

Examples: Notable hard forks include Bitcoin Cash from Bitcoin and Ethereum Classic from Ethereum. These forks occurred due to disagreements within the community on how to handle certain protocol changes, leading to the creation of separate blockchains.

Upgrade Requirements: Participants on the blockchain who wish to continue on the new chain after a hard fork must update their software. Those who do not upgrade remain on the original chain, which continues as a separate, incompatible blockchain.

Thus, the correct answer isHard fork (A), as it directly refers to a blockchain split that requires client upgrades for participation.