Blockchain Consensus Mechanisms and Their Applications BBLC Practice Questions (Page 8)

Questions 36–40

1. 36foundation · easy

   In a blockchain context, what does consensus primarily ensure?

   • AThat every node stores a copy of the ledger on the same physical server
   • BThat transactions are processed instantly without any delay
   • CThat all honest nodes agree on a single, consistent state of the ledger
   • DThat the network has a central authority to validate all transactions
   Reveal Solution Discussion Select an answer first
2. 37foundation · easy

   How does PoS validation differ from PoW mining?

   • APoS validation requires specialized hardware like ASICs
   • BPoS validators are selected based on stake, while PoW miners compete with computational power
   • CPoW mining is more energy-efficient than PoS validation
   • DPoS validators are chosen randomly without any requirements
   Reveal Solution Discussion Select an answer first
4. 38application · medium

   A cryptocurrency exchange is considering which blockchain to use for a new token. They want to minimize the risk of a 51% attack and ensure that the network remains secure even if some miners act maliciously. Which consensus mechanism provides the strongest security against a 51% attack?

   • AProof of Authority (PoA) with a single authority
   • BProof of Work (PoW) with a high hash rate
   • CDelegated Proof of Stake (DPoS) with few delegates
   • DProof of Stake (PoS) with a small number of validators
   Reveal Solution Discussion Select an answer first
5. 39foundation · easy

   In Proof of Stake, how does the 'nothing at stake' problem relate to game theory?

   • AValidators have everything to lose, so they always act honestly
   • BValidators are not required to stake any tokens
   • CValidators might be incentivized to vote on multiple blockchain forks because it costs them nothing
   • DValidators are chosen randomly without any economic incentive
   Reveal Solution Discussion Select an answer first
6. 40application · medium

   A blockchain project plans to conduct an initial coin offering (ICO) to raise funds. They want to ensure that the token's value is supported by real usage and that early adopters are incentivized to participate. Which distribution and supply strategy is most likely to promote long-term value?

   • AAirdrop tokens to a wide audience to increase adoption
   • BBurn a large percentage of tokens to create scarcity
   • CAllocate a portion of tokens for an ICO, a portion for the team, and a portion for a community fund, with a gradual release schedule
   • DSell all tokens in the ICO to maximize initial funding
   Reveal Solution Discussion Select an answer first