Are You Prepared for a 51% Attack on Bitcoin Network?
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Questions and Answers

What is a 51% attack?

  • When a group of miners control more than 50% of the network and act maliciously (correct)
  • When a group of miners control less than 50% of the network and act maliciously
  • When a group of miners control more than 75% of the network and act maliciously
  • When a group of miners control exactly 50% of the network and act maliciously
  • What can an attacker accomplish with a 51% attack?

  • They can create new bitcoins
  • They can delete blocks from the blockchain
  • They can change the timestamp of a block
  • They can double-spend a transaction (correct)
  • How many confirmations does the genesis block have?

  • 1
  • 2
  • 0 (correct)
  • 3
  • What is the max size of a nonce in a block header?

    <p>32</p> Signup and view all the answers

    What does the Merkle Root represent?

    <p>A hash that represents all the transactions in the block</p> Signup and view all the answers

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