Blockchain Developer Certification Practice

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Prepare for the Blockchain Developer Certification. Master blockchain concepts with flashcards and multiple choice questions. Explanation-based learning for your success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

In a contract creation transaction, what is unique about the "to" field?

It contains the contract's address
It is blank
It specifies the desired gas limit
It indicates the receiver's account

The correct answer is: It is blank

In a contract creation transaction, the "to" field is unique because it is intentionally left blank. This absence indicates that the transaction is not directed towards an existing address but rather is for creating a new contract. When a contract is deployed on the blockchain, it is given a unique address generated in part from the address of the sender and the number of transactions they've previously sent. This is distinct from regular transactions where the "to" field specifies the address of the recipient’s account. In the case of contract creation, however, a new address will be calculated and assigned to the contract, so having the "to" field blank signifies the intention of creating a contract rather than sending funds to a pre-existing account. This understanding is crucial for developers to correctly implement and deploy smart contracts on the blockchain.