A developer is setting up a local development environment for a dApp that will later be deployed to a public testnet. The developer wants to test contract interactions and frontend integration without spending test ETH. Which setup is most appropriate?

Run a full Ethereum node and mine your own blocks.

Deploy directly to the Ethereum mainnet and use a faucet to get ETH.

Use a public testnet like Sepolia and request ETH from a faucet.

Use a local blockchain like Ganache or Hardhat Network with a funded account for testing.

Which access control pattern is commonly used in smart contracts to restrict sensitive functions to the contract owner?

The Ownable pattern with an onlyOwner modifier

A dApp team wants to monitor transactions and errors in real time. They have a backend server that listens to contract events and logs them. They also want to track frontend errors. Which combination of tools should they use?

Use a database to store all transactions and a custom dashboard for errors.

Use a blockchain explorer for contract events and a browser console for frontend errors.

Use a REST API to poll for contract events and store logs in a local file.

Use a WebSocket provider to subscribe to contract events and a logging service like Sentry for frontend errors.

A team is deploying a dApp where the frontend is hosted on IPFS and the backend uses a Node.js server that listens for events from a smart contract. The contract is deployed on Polygon. Which configuration step is essential for the backend to receive contract events?

Configure the frontend to poll the backend every second for new events.

Set the backend's WebSocket provider URL to a Polygon RPC endpoint that supports subscriptions.

Embed the contract's bytecode in the backend's environment variables.

Deploy a second copy of the contract on the same address to ensure event delivery.

Which of the following is a prerequisite for deploying a smart contract to a public blockchain network?

A dedicated server with a static IP address

A funded wallet with the network's native cryptocurrency

A centralized database to store contract state

A registered domain name for the dApp

EC-CouncilBlockchain Developer Certification

Domain 6Objective 6

Deploy and Manage dApps BDC Practice Questions (Page 3)

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

40questions here

8free pages

10concepts

Questions 11–15

11application · medium
A developer is setting up a local development environment for a dApp that will later be deployed to a public testnet. The developer wants to test contract interactions and frontend integration without spending test ETH. Which setup is most appropriate?
Select an answer first
12foundation · easy
Which access control pattern is commonly used in smart contracts to restrict sensitive functions to the contract owner?
Select an answer first
13application · medium
A dApp team wants to monitor transactions and errors in real time. They have a backend server that listens to contract events and logs them. They also want to track frontend errors. Which combination of tools should they use?
Select an answer first
14application · medium
A team is deploying a dApp where the frontend is hosted on IPFS and the backend uses a Node.js server that listens for events from a smart contract. The contract is deployed on Polygon. Which configuration step is essential for the backend to receive contract events?
Select an answer first
15foundation · easy
Which of the following is a prerequisite for deploying a smart contract to a public blockchain network?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to BDC

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by EC-Council. “BDC” is a trademark of its owner, used for identification only.