Which of the following statements is true about Digital Signatures?

A digital signature is a private key that is generated by a random number generator

What was Satoshi’s solution to disincentivize participants from tampering with the ledger?

By making it easy to detect that the ledger had been tampered

Which of the following statements is NOT true regarding elements of Blockchain technology?

A Hash pointer turns the linked list into a blockchain by creating a link to the previous object

Which of the following statement is true about the SHA-256?

SHA-256 has collision-resistance, meaning two inputs of SHA-256 are very unlikely to produce the same output

Which of the following is one of the steps in a Bitcoin Distributed Consensus Algorithm?

At a fixed interval, a random node gets to propose its block

Batman creates Batcoin and gives the Batcoin to Alfred. Alfred then gives the Batcoin to Batgirl. However, the Joker decides to create a fake message that transfer the Batcoin from Alfred to himself. Which of the following statement is correct? (Select all that apply)

It is the policy of the honest nodes to extend the longest fork, and so Alfred’s fork to Batgirl will get extended and the Joker’s short fork will be abandoned. Nodes are chosen at random to ensure difficulty for any single biased node to control the blockchain

Batman creates Batcoin and gives the Batcoin to Alfred. Alfred then gives the Batcoin to Batgirl. However, the Joker decides to create a fake message that transfer the Batcoin from Alfred to himself. How do Block Rewards prevent the Joker from getting away with taking Batman’s Batcoin?

Because the next block after the Joker’s block also wants to receive the Block Reward, accepting the Joker’s block will make it less likely that this block will be accepted in the next round

Rules and Structure of Bitcoin - Practice MCQ Test

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Rules and Structure of Bitcoin – Practice MCQ Test

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