Interview Questions and Answers

A wallet in blockchain is a digital tool that allows users to store and manage their cryptographic keys, which are essential for accessing and managing their cryptocurrency holdings and conducting transactions.

A consensus algorithm is used to achieve agreement among nodes in a blockchain network on the validity of transactions. It ensures that all participants have a consistent view of the distributed ledger.

A node is a computer or device that participates in a blockchain network. Nodes maintain a copy of the blockchain, validate transactions, and contribute to the consensus process by reaching agreement on the state of the ledger.

A private key is a cryptographic key that provides access to a user's cryptocurrency holdings. It must be kept secure, as it is used to sign transactions and prove ownership of digital assets on the blockchain.