Blockchain اسئلة واجوبة المقابلات
سؤال 16. What is the role of a decentralized application (DApp) in blockchain?
A decentralized application is a software application that runs on a decentralized network, typically a blockchain. DApps operate on a peer-to-peer network and are not controlled by a single entity, promoting transparency and censorship resistance.
سؤال 17. What is a sidechain in blockchain?
A sidechain is a separate blockchain that is interoperable with a main blockchain. It allows for the transfer of assets between the sidechain and the main chain, enabling the development of specific features or scalability solutions.
سؤال 18. Explain the role of a node in a blockchain network.
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.
سؤال 19. What is the purpose of a private key in cryptocurrency?
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.
سؤال 20. Explain the role of the mempool in blockchain transactions.
The mempool (memory pool) is a temporary storage area where valid but unconfirmed transactions are held before being added to a block. Miners select transactions from the mempool when creating new blocks.
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