Blockchain Developer Consensus Algorithms and Protocols 3

Question 1

In the Raft consensus algorithm, what role is responsible for handling all client requests?

Accepted Answer

Leader

Answer

In Raft, the elected leader handles client requests and replicates the log to followers.

Question 2

What is the primary purpose of a 'slashing' mechanism in Proof of Stake?

Accepted Answer

To penalize validators for misbehavior

Answer

Slashing destroys part of a validator's stake to punish malicious or faulty behavior.

Question 3

Which consensus property guarantees that all honest nodes eventually agree on the same value?

Accepted Answer

Agreement (safety)

Answer

Agreement, a safety property, ensures all honest nodes decide on the same value.

Question 4

In Proof of Stake, what generally determines a validator's chance of being selected to propose a block?

Accepted Answer

Amount of stake committed

Answer

Selection probability typically scales with the amount of tokens a validator stakes.

Question 5

What does the FLP impossibility result state about distributed consensus?

Accepted Answer

No deterministic protocol guarantees consensus in an async system with one faulty process

Answer

FLP proves no deterministic asynchronous protocol can guarantee consensus if even one process may fail.

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