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!

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What is the unique identifier associated with an Ethereum account?

Private Key
Public Key
Account Address
Node ID

The correct answer is: Account Address

The unique identifier associated with an Ethereum account is the account address. In the Ethereum network, each account has a distinct address that functions as its identifier. This address is derived from the public key through a hashing process, specifically via the Keccak-256 hash function. The address is what other users and smart contracts use to send and receive transactions, making it a fundamental part of Ethereum’s transactional system. The private key is essential for signing transactions and proving ownership of the account, but it is not the identifier itself. The public key also plays a role in generating the account address, yet it is not directly used for transactions as the address is. Node ID, on the other hand, refers to a unique identifier for nodes on the Ethereum network, which is separate from the notion of an account. Thus, the account address stands out as the specific identifier for an Ethereum account, functioning as the main point of interaction within the network.