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Quiz 3.3.2

Pregunta de Selección Múltiple

Pregunta

What is the main purpose of using a tool like Web3.js in blockchain data reading?

Respuestas

a) To create blockchain networks

b) To interact programmatically with blockchain nodes

c) To manage server infrastructure

d) To increase transaction speed

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Pregunta

Which of the following is NOT necessary to read data from a smart contract?

Respuestas

a) Contract address

b) Transaction gas fee

c) ABI (Application Binary Interface)

d) A blockchain node connection

Retroalimentación

Pregunta

Why is connecting to an Ethereum node essential in data retrieval?

Respuestas

a) It allows direct interaction with the blockchain network

b) It increases transaction speed

c) It verifies transactions automatically

d) It provides high-level security protocols

Retroalimentación

Pregunta

What type of information can you retrieve from a smart contract?

Respuestas

a) Token balances

b) User emails

c) Current transaction fees

d) IP addresses of users

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Pregunta

Which of the following are libraries commonly used to programmatically access blockchain data?

Respuestas

a) Web3.js

b) TensorFlow

c) Ethers.js

d) Flask

Retroalimentación

Pregunta

What role does an ABI play in interacting with a smart contract?

Respuestas

a) It provides a structure to interpret smart contract functions

b) It enables faster transactions on the network

c) It secures the private keys of users

d) It encodes the transaction data

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Pregunta

Which of the following is true when retrieving Uniswap token price data?

Respuestas

a) You must use an Ethereum node connection

b) You can retrieve data from any public Ethereum blockchain explorer

c) Gas fees are required to read data from smart contracts

d) You need the correct contract address and ABI

Retroalimentación

Pregunta

In what scenario might Web3.js be preferred over Ethers.js?

Respuestas

a) When managing multiple blockchain networks

b) For lightweight front-end interactions

c) For detailed transaction history data access

d) When security and small size are prioritized

Retroalimentación

Pregunta

What challenges might arise when retrieving data programmatically from a smart contract on a public Ethereum node?

Respuestas

a) Data inaccuracies

b) Rate limits on public nodes

c) Difficulty in decoding ABI functions

d) Increased latency in data retrieval

Retroalimentación

Pregunta

Which functions in Uniswap contracts would be typically used to retrieve price data?

Respuestas

a) getPrice

b) getReserves

c) price

d) swapExactTokensForTokens

Retroalimentación

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