A developer is deploying a contract that creates child contracts. The child contracts are created using the CREATE opcode. What is a key difference between CREATE and CREATE2?

CREATE2 allows the contract to be created without paying gas.

CREATE is more gas-efficient than CREATE2.

CREATE2 uses a salt to deterministically compute the new contract's address.

CREATE2 allows the developer to specify the new contract's address.

What is the primary role of the Ethereum Virtual Machine (EVM) within the Ethereum network?

To store the entire blockchain state in a centralized database

To mine new blocks and validate transactions

To provide a graphical interface for users to interact with decentralized applications

To execute smart contract bytecode in a deterministic and isolated environment

A developer is optimizing a function that reads a storage variable multiple times. They notice that each read costs gas. What is the best way to reduce gas costs?

Use a constant instead of a storage variable.

Read the storage variable once and store it in a local memory variable.

Use inline assembly to read the storage variable directly.

Make the storage variable public to allow external reads.

What is the effect of the EVM opcode SSTORE?

It writes a 256-bit word to persistent storage

It pushes a 256-bit word onto the stack

It deletes a word from persistent storage

It reads a 256-bit word from persistent storage

What is the first step in the lifecycle of a smart contract on Ethereum?

Deployment via a transaction that includes the contract's bytecode

Calling a function on the contract from an external account

Registering the contract in a global registry

Mining a block that includes the contract's source code

EC-CouncilBlockchain Developer Certification

Domain 5Objective 2

Ethereum Virtual Machine BDC Practice Questions (Page 7)

Part of the Ethereum and Smart Contract Development domain, which makes up ~11% of our current practice bank.

43questions here

9free pages

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Questions 31–35

31expert · hard
A developer is deploying a contract that creates child contracts. The child contracts are created using the CREATE opcode. What is a key difference between CREATE and CREATE2?
Select an answer first
32foundation · easy
What is the primary role of the Ethereum Virtual Machine (EVM) within the Ethereum network?
Select an answer first
33expert · hard
A developer is optimizing a function that reads a storage variable multiple times. They notice that each read costs gas. What is the best way to reduce gas costs?
Select an answer first
34foundation · easy
What is the effect of the EVM opcode SSTORE?
Select an answer first
35foundation · easy
What is the first step in the lifecycle of a smart contract on Ethereum?
Select an answer first

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