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Questions
Unknown Question Type
In blockchain, the longest-chain criterion is based on the idea that the blockchain data structure that comprises the least number of blocks represents the most aggregated computational effort.
Options
A.No, this is incorrect.
B.None of the answers are correct.
C.Yes, this is correct.
D.This is sometimes correct, and sometimes not correct.
View Explanation
Standard Answer
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Approach Analysis
The question presents a statement about the longest-chain criterion in blockchain and asks us to evaluate the provided options.
Option 1: 'No, this is incorrect.' This aligns with the standard understanding of the longest-chain rule in most blockchain protocols (e.g., Bitcoin) where the valid chain is the one with the greatest cumulative proof......Login to view full explanationLog in for full answers
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Similar Questions
The author points out several benefits of the proof-of-stake protocol, including: 1. Elimination of expenses related to maintaining the ledger's history. 2. Enhanced permanence of the network's regulations. 3. Raised expense for executing a brute-force assault. 4. Conservation of resources (such as energy) which is then used for coin deflation. 5. Minimal tolerance for errors. 6. Improved oversight over the communication's chain of custody. 7. Dependence on specific verification (check) points. 8. Facilitation of a concept called maximal extracted value. A. 1 & 2 are advantages. B. 3 & 4 are advantages. C. 5 & 6 are advantages. D. 7 & 8 are advantages. E. All of the above are advantages.
What is the main reason that Bitcoin has a consensus protocol?
A 51‐percent attacker is someone who controls 51 percent or more of the mining power in the Bitcoin network. Let’s say the 51 percent attacker creates an invalid block that contains an invalid transaction that represents stealing bitcoins from an existing address not belonging to the attacker and transferring them to his own address. Can the attacker subvert the consensus process? Which of the following statement(s) is/are true?
A simplified version of the Bitcoin Consensus Algorithm is shown below: 1. New transactions are broadcast to all nodes 2. Each node collects new transactions into a block 3. In each round a random node gets to broadcast its block 4. Other nodes accept the block only if all transactions in it are valid (unspent, valid signatures) 5. Nodes express their acceptance of the block by including its hash in the next block they create Using this algorithm, can a user such as Alice, who really dislikes Bob, deny service to Bob by not including Bob’s transactions in any block that she proposes to get onto the blockchain?
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