A developer is debugging a contract in Hardhat and needs to trace a transaction that calls multiple contracts. They want to see the call sequence and gas usage. Which tool should they use?

Hardhat's built-in gas reporter plugin

Hardhat's console.log in each contract

Hardhat's debug_traceTransaction with callTracer

A developer is setting up a Truffle project and wants to use the HDWalletProvider to deploy to the Rinkeby test network. They have a mnemonic and an Infura project ID. Where should they configure these credentials?

In truffle-config.js, within the networks.rinkeby provider function.

In the package.json file, under the 'truffle' key.

In the .env file, but only if using the 'truffle develop' command.

In the migrations folder, inside the deployment script.

Which Hardhat plugin is commonly used to test smart contracts with JavaScript or TypeScript?

@nomicfoundation/hardhat-toolbox

A developer is debugging a contract in Remix and wants to see the value of a state variable at a specific point during a transaction. Which approach should they use?

Use the Solidity compiler to output the state variable values

Use the ABI to decode the state variable

Add a console.log statement in the contract and view the output in the Remix terminal

Use the Debugger to step through and inspect storage

EC-CouncilBlockchain Developer Certification

Domain 6Objective 2

Blockchain IDEs and Plugins BDC Practice Questions (Page 1)

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

39questions here

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Questions 1–5

1expert · hard
A developer is debugging a contract in Hardhat and needs to trace a transaction that calls multiple contracts. They want to see the call sequence and gas usage. Which tool should they use?
Select an answer first
2application · medium
A developer is setting up a Truffle project and wants to use the HDWalletProvider to deploy to the Rinkeby test network. They have a mnemonic and an Infura project ID. Where should they configure these credentials?
Select an answer first
3foundation · easy
Which Hardhat plugin is commonly used to test smart contracts with JavaScript or TypeScript?
Select an answer first
4application · medium
A developer is debugging a contract in Remix and wants to see the value of a state variable at a specific point during a transaction. Which approach should they use?
Select an answer first
5foundation · easy
In a Truffle project, which directory is the default location for smart contract Solidity source files?
Select an answer first

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