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Questions and Answers
What is a 51% attack?
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?
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?
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?
What is the max size of a nonce in a block header?
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What does the Merkle Root represent?
What does the Merkle Root represent?
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