A company is designing a permissioned blockchain for a multi-organization supply chain. They need to ensure that the network is resilient, that participants can trust the data, and that the system complies with industry regulations. Which of the following are key components of the blockchain ecosystem that should be included? (Select all that apply.)

An identity management system to authenticate participants and control access

A public API that allows anyone to read all transaction data

A consensus mechanism that defines how transactions are validated

A governance model that specifies how decisions are made and disputes are resolved

A cryptocurrency that must be used for all transactions on the network

A consortium of banks is designing a permissioned blockchain for cross-border payments. They need to decide on a consensus mechanism that provides finality, high throughput, and energy efficiency, while allowing only approved banks to validate transactions. Which consensus mechanism is most appropriate?

Practical Byzantine Fault Tolerance (PBFT) with a fixed set of authorized validators

Delegated Proof of Stake (DPoS) with token-holder voting

Proof of Stake (PoS) with a public validator set

A developer is designing a supply chain dApp that uses a smart contract to track goods. The dApp needs to interact with a web frontend and allow users to query the status of a shipment. Which component is essential for the frontend to communicate with the blockchain?

A centralized database that stores the shipment data and syncs with the blockchain.

A sidechain that processes frontend requests before they reach the main chain.

A node provider or an API gateway that exposes the smart contract's functions to the web application.

A custom consensus mechanism that the frontend uses to validate transactions.

A government agency wants to issue digital identity credentials to citizens on a blockchain. They need to ensure that citizens can prove their identity without revealing unnecessary personal information, and that the system complies with privacy regulations. Which approach best meets these requirements?

Use a decentralized identifier (DID) with verifiable credentials that allow selective disclosure of attributes

Store all personal data on-chain and give citizens a private key to access it

Encrypt all personal data and store the encryption keys on the blockchain

Use a centralized database with blockchain only for logging access attempts

A company is evaluating whether to join an existing blockchain consortium or build a new private blockchain. They want to share data with partners but also need to maintain control over governance and membership. What is the most important factor to consider when choosing between a consortium and a private blockchain?

The programming language used to write smart contracts

The transaction throughput of the underlying consensus mechanism

The level of decentralization and trust among the participating organizations

The market capitalization of the cryptocurrency associated with the blockchain

EC-CouncilBlockchain Developer Certification

Domain 1Objective 2

Blockchain Ecosystem and Use Cases BDC Practice Questions (Page 1)

Part of the Blockchain Fundamentals and Architecture domain, which makes up ~14% of our current practice bank.

50questions here

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Questions 1–5

1application · medium · select all that apply
A company is designing a permissioned blockchain for a multi-organization supply chain. They need to ensure that the network is resilient, that participants can trust the data, and that the system complies with industry regulations. Which of the following are key components of the blockchain ecosystem that should be included? (Select all that apply.)
Select an answer first
2application · medium
A consortium of banks is designing a permissioned blockchain for cross-border payments. They need to decide on a consensus mechanism that provides finality, high throughput, and energy efficiency, while allowing only approved banks to validate transactions. Which consensus mechanism is most appropriate?
Select an answer first
3application · medium
A developer is designing a supply chain dApp that uses a smart contract to track goods. The dApp needs to interact with a web frontend and allow users to query the status of a shipment. Which component is essential for the frontend to communicate with the blockchain?
Select an answer first
4application · medium
A government agency wants to issue digital identity credentials to citizens on a blockchain. They need to ensure that citizens can prove their identity without revealing unnecessary personal information, and that the system complies with privacy regulations. Which approach best meets these requirements?
Select an answer first
5application · medium
A company is evaluating whether to join an existing blockchain consortium or build a new private blockchain. They want to share data with partners but also need to maintain control over governance and membership. What is the most important factor to consider when choosing between a consortium and a private blockchain?
Select an answer first

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Blockchain Ecosystem and Use Cases BDC Practice Questions (Page 1)

Questions 1–5

A developer is designing a supply chain dApp that uses a smart contract to track goods. The dApp needs to interact with a web frontend and allow users to query the status of a shipment. Which component is essential for the frontend to communicate with the blockchain?

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