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CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Internet and Other Technologies

In a proof-of-work blockchain, what is the primary role of miners?

In proof-of-work, miners validate pending transactions and compete to add the next block by solving a computational puzzle. The winning miner's block is accepted by the network and rewarded. Miners neither hold users' private keys nor judge legal validity.

  1. ATo validate pending transactions and compete to add a new block by solving a computational puzzleCorrect
  2. BTo issue digital signatures on behalf of all users
  3. CTo store the private keys of wallet holders securely
  4. DTo approve the legality of transactions under the Information Technology Act, 2000

Explanation

Miners bundle pending transactions into a block and compete to solve a computational puzzle; the winner adds the block and is rewarded. Miners do not hold users' private keys or sign for them, and they do not give legal approval of transactions.

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