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      Question

      What is a

      blockchain?
      A A single server hosting a database Correct Answer Incorrect Answer
      B A distributed ledger technology Correct Answer Incorrect Answer
      C A cloud-based file storage system Correct Answer Incorrect Answer
      D An algorithm for encryption Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      A blockchain is a distributed and decentralized digital ledger technology. It is a chain of blocks that store data in a secure, transparent, and tamper-resistant manner across a network of computers.

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