What is a critical step when migrating a dApp's smart contract to a new network?

Deleting the old contract's code from the blockchain

Updating the frontend to use the new network's RPC URL and contract address

Migrating all user balances and state data to the new contract

Changing the network's consensus algorithm

A dApp's admin key is controlled by a single EOA. The team wants to reduce the risk of a compromised key while maintaining the ability to perform urgent administrative actions. Which approach best balances security and operational flexibility?

Keep the single EOA key but store it in an HSM.

Use a multi-signature wallet with a 2-of-3 configuration and store the keys in separate secure locations.

Use a timelock contract that delays all admin actions by 7 days.

Distribute the private key to three team members.

What is the purpose of a decommissioning plan for a dApp?

To outline steps for safely shutting down services and informing users

To increase the gas fees for the final transactions

To transfer the dApp's domain name to another owner

To automatically delete all user data from the blockchain

What is the purpose of a deployment script in a smart contract development framework?

To create a local blockchain network

To automate the process of compiling and deploying contracts to a specified network

To write the frontend code for the dApp

To manage the private keys of all users

What is the purpose of off-chain computation in a dApp?

To make the dApp fully decentralized

To store data permanently on the blockchain

To reduce on-chain gas costs by performing heavy calculations outside the blockchain

To increase the security of the smart contract

EC-CouncilBlockchain Developer Certification

Domain 6Objective 6

Deploy and Manage dApps BDC Practice Questions (Page 8)

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

40questions here

8free pages

10concepts

Questions 36–40

36foundation · easy
What is a critical step when migrating a dApp's smart contract to a new network?
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37expert · hard
A dApp's admin key is controlled by a single EOA. The team wants to reduce the risk of a compromised key while maintaining the ability to perform urgent administrative actions. Which approach best balances security and operational flexibility?
Select an answer first
38foundation · easy
What is the purpose of a decommissioning plan for a dApp?
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39foundation · easy
What is the purpose of a deployment script in a smart contract development framework?
Select an answer first
40foundation · easy
What is the purpose of off-chain computation in a dApp?
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