Blockchain Developer Certification Practice

What happens when trying to deploy a smart contract on the ETH network?

1. The transaction automatically fails.

2. The network checks if the 'to' field is empty.

3. The gas limit must be set to zero.

4. The account must have more than 0.5 ETH.

The correct answer is: The network checks if the 'to' field is empty.

When deploying a smart contract on the Ethereum network, the system indeed checks if the 'to' field is empty. This is a fundamental aspect of how Ethereum transactions operate. In the context of deploying a smart contract, if the 'to' field is empty, it indicates that the transaction is intended to create a new contract rather than interact with an existing one. When the 'to' field is empty, Ethereum knows that a new contract is being created, which is reflected in the transaction's data payload. This new contract's code is stored on the blockchain, and a new address is generated for it based on the sender's address and the nonce of the transaction. This process is different from calling a function on an existing contract, where the 'to' field would specify the address of that contract. Other options provided do not align with the requirements of deploying a smart contract. Transactions do not automatically fail unless there are issues in the smart contract logic or insufficient gas provided. Setting the gas limit to zero is not valid, as deploying a contract requires gas to execute the operation. Lastly, there is no strict requirement for the account to maintain a balance of more than 0.5 ETH just to deploy a contract; however, there has to be enough