The Ultimate Blockchain Quiz

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Questions and Answers

Which of the following best describes a blockchain?

  • A centralized ledger with growing lists of records
  • A distributed ledger with growing lists of records (correct)
  • A ledger with decreasing lists of records
  • A decentralized ledger with static lists of records

What information is contained in each block of a blockchain?

  • Cryptographic hash of the next block
  • Consensus algorithm protocol
  • Merkle tree structure (correct)
  • Timestamp and transaction data

Why are blockchain transactions considered irreversible?

  • The data in any given block is encrypted and cannot be accessed
  • The data in any given block can be easily altered retroactively
  • The data in any given block cannot be altered retroactively without altering all subsequent blocks (correct)
  • The data in any given block is stored in a centralized location

How are blockchains typically managed?

<p>By a peer-to-peer computer network (B)</p>
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What happens when a blockchain fork occurs?

<p>The blockchain splits into two separate chains (D)</p>
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