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Quiz 3.3.4

Pregunta de selección múltiple

Pregunta

What is the primary purpose of gas fees in Ethereum transactions?

Respostas

a) To secure the network

b) To incentivize miners for processing transactions

c) To control smart contract access

d) To decrease transaction time

Retroalimentación

Pregunta

Which of the following libraries can be used to send data to an Ethereum smart contract?

Respostas

a) Web3.js

b) Ethers.js

c) React.js

d) Solidity

Retroalimentación

Pregunta

What is a common reason for transaction failure when writing data to a blockchain?

Respostas

a) Incorrect gas fee settings

b) Outdated ABI

c) Private key is missing

d) Low network connection speed

Retroalimentación

Pregunta

Which of these is essential to initiate a token swap on Uniswap?

Respostas

a) Contract ABI and address

b) Wallet balance

c) Node connection

d) Prior approval from Uniswap

Retroalimentación

Pregunta

What factors affect the cost of a transaction when writing to a blockchain?

Respostas

a) Gas fees

b) Node speed

c) Data size of the transaction

d) Time of transaction

Retroalimentación

Pregunta

When using Metamask to write data to a smart contract, which step is essential for security?

Respostas

a) Configuring the gas limit accurately

b) Verifying transaction details before approval

c) Clearing browser cache

d) Manually encoding the ABI

Retroalimentación

Pregunta

Which function might you use in Uniswap's contract to write data for a token swap?

Respostas

a) swapExactTokensForTokens

b) approve

c) getPrice

d) swap

Retroalimentación

Pregunta

What are possible consequences of setting a gas limit too low in a transaction?

Respostas

a) Transaction completion at a lower cost

b) Transaction failure and gas loss

c) Delay in transaction processing

d) Potential to rerun the transaction

Retroalimentación

Pregunta

What steps should be taken to verify a successful transaction on the Ethereum blockchain?

Respostas

a) Check transaction hash on Etherscan

b) Compare ABI with the contract on Etherscan

c) Ensure the wallet balance is updated

d) Decode transaction data manually

Retroalimentación

Pregunta

Which best practices help minimize gas fees when writing data to a blockchain?

Respostas

a) Execute transactions during low network activity times

b) Set the gas price manually based on network conditions

c) Use a blockchain explorer to find optimal gas settings

d) Limit the transaction size

Retroalimentación

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