Which characteristic is typical of a decentralized application (dApp)?

The backend runs on a blockchain and the application is open-source.

The application's source code is closed and proprietary.

User data is stored in a single centralized database.

The backend code runs on a centralized server.

A small team is developing a dApp on Ethereum. They do not want to run their own node, but they need a reliable way to read blockchain state and broadcast transactions from their backend. They also want to test their smart contracts locally before deploying to the mainnet. Which combination of tools best addresses these needs?

Use a public RPC endpoint from a free service and write all tests against the mainnet.

Run a full Ethereum node on a spare laptop and use the Remix IDE for all development and testing.

Use a node provider like Infura for mainnet access and a local development framework like Hardhat for testing.

Use a cloud database to store blockchain data and a custom script to interact with the blockchain.

What role do governance token holders play in the Web3 ecosystem?

They mine new blocks on the blockchain.

They provide decentralized storage.

They participate in decision-making for decentralized protocols.

They develop the frontend of dApps.

What is a smart contract?

A legal agreement between two parties that is enforced by a court.

A centralized database that stores contract terms.

A self-executing program stored on a blockchain that automatically enforces agreements.

A type of cryptocurrency used for payments.

Which of the following is a key participant in the Web3 ecosystem?

Central bank regulators who control all transactions.

Cloud providers who host centralized databases.

Miners or validators who secure the network.

Internet service providers who manage data flow.

EC-CouncilBlockchain Developer Certification

Domain 6Objective 4

Web 3.0 Ecosystem and Components BDC Practice Questions (Page 1)

Part of the Development Tools, Web3, and dApps domain, which makes up ~11% of our current practice bank.

50questions here

10free pages

12concepts

12 Concepts in This Objective

Web3 Definition and Core Principles
Blockchain as Web3 Foundation
Cryptocurrencies and Tokens
Smart Contracts
Decentralized Applications (dApps)
Decentralized Autonomous Organizations (DAOs)
Web3 Wallets and Identity
Decentralized Storage Solutions
Interoperability and Cross-Chain Protocols
Web3 Infrastructure and Development Tools
Web3 Ecosystem Participants
Web3 Use Cases and Applications

Questions 1–5

1foundation · easy
Which characteristic is typical of a decentralized application (dApp)?
Select an answer first
2application · medium
A small team is developing a dApp on Ethereum. They do not want to run their own node, but they need a reliable way to read blockchain state and broadcast transactions from their backend. They also want to test their smart contracts locally before deploying to the mainnet. Which combination of tools best addresses these needs?
Select an answer first
3foundation · easy
What role do governance token holders play in the Web3 ecosystem?
Select an answer first
4foundation · easy
What is a smart contract?
Select an answer first
5foundation · easy
Which of the following is a key participant in the Web3 ecosystem?
Select an answer first

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