Ethereum Module Assessment

Welcome to your Ethereum Module Assessment

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Name

Phone

In Hardhat, what is the hardhat-ethers plugin used for?

To deploy smart contracts

To compile Solidity contracts

To integrate with the Ethers.js library

To run a local Ethereum network

None

In Solidity, what is the purpose of the require function?

To check for conditions and throw an error if the condition is not met, reverting the transaction

To specify external libraries required by the smart contract

To initiate the smart contract deployment process

To import necessary modules for the smart contract

None

What is a 'multisig wallet' in Ethereum?

A wallet that supports multiple cryptocurrencies

A wallet that stores smart contracts

A wallet that requires multiple signatures to authorize transactions

A wallet with enhanced security features

None

What is the '51% attack' in blockchain?

An attack targeting 51% of the transactions

An attack where a single node controls 51% of the network traffic

An attack on the network's consensus algorithm

An attack where miners control 51% of the network's mining power

None

Which configuration file does Hardhat use for project settings?

hardhat.config.json

hardhat.config.js

config.hardhat.js

hardhat-settings.js

None

In blockchain terminology, what is 'sharding'?

A method to store data off-chain

A method to mine multiple blocks simultaneously

A way to encrypt blockchain data

A technique to split the blockchain into smaller, more manageable pieces

None

What does the 'memory' keyword in Solidity indicate?

The location for storing event logs

A variable that can be accessed by any contract

Data location that is only available during function execution

A function that stores data permanently on the blockchain

None

How can you access the current block's timestamp in Solidity?

msg.timestamp

now

current.timestam

block.timestamp

None

Which of the following is an Ethereum Layer 2 solution that uses Optimistic Rollups?

Optimism

Lightning Network

ZK-Rollups

Plasma

None

10.

What is the role of the Solc-compiler in Ethereum smart contract development?

To compile the Solidity code into bytecode that can be run on the Ethereum Virtual Machine (EVM)

To execute the smart contract

To deploy the smart contract on the Ethereum network

To provide an interface for interacting with the smart contract

None

11.

When a smart contract is deployed to the Ethereum blockchain, what gets created?

A contract address

A user account

A new blockchain

A unique transaction ID

None

12.

What is the Ethereum Contract ABI?

A protocol for secure communication between Ethereum nodes

A tool for compiling smart contracts

A library for writing smart contracts in Solidity

A data structure that facilitates interaction between the EVM and the outside world

None

13.

Which function in Solidity is used to handle incoming ether transfers?

transfer

payable

fallback

receive

None

14.

How does Proof of Stake (PoS) differ from Proof of Work (PoW)?

PoS is used only for private blockchains

PoS relies on computational power while PoW relies on ownership of tokens

PoW relies on computational power while PoS relies on ownership of tokens

PoS and PoW are identical

None

15.

Which of the following best describes a decentralized autonomous organization (DAO)?

A central governing body for blockchains

A type of consensus algorithm

A cryptocurrency exchange platform

A smart contract-based organization without centralized control

None

16.

Which statement is true about Solidity?

Solidity is a low-level assembly language for writing blockchain applications.

Solidity is a purely functional programming language.

Solidity is an object-oriented, high-level language for implementing smart contracts.

Solidity is used for developing smart contracts on the Bitcoin blockchain.

None

17.

Which platform is commonly used to deploy Ethereum-based DApps?

Heroku

Docker

IPFS

AWS Lambda

None

18.

What does the Hardhat Network provide for developers?

A blockchain explorer

A cloud-based Ethereum node

A local Ethereum network for testing and development

A tool for mining Ethereum

None

19.

What is the purpose of an ABI (Application Binary Interface) in Ethereum?

To provide a user interface for interacting with the Ethereum network

To handle the storage of smart contracts on the blockchain

To define how functions in the smart contract can be called and data can be sent between contracts and external applications

To define the bytecode of a smart contract

None

20.

Which command is used to compile a Solidity contract using the Solc-compiler?

solc --bin .sol

solc compile .sol

solc --compile .sol

solc .sol

None

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