Blockchain Consensus Mechanisms and Their Applications BBLC Practice Questions (Page 10)

Questions 46–50

1. 46foundation · easy

   When selecting a consensus mechanism, what does 'scalability' refer to?

   • AThe ability to prevent malicious attacks
   • BThe ability of the network to handle an increasing number of transactions and nodes
   • CThe ability to keep energy consumption low
   • DThe ability to recover from node failures
   Reveal Solution Discussion Select an answer first
2. 47foundation · easy

   What is an airdrop in the context of token distribution?

   • AMining new tokens using specialized hardware
   • BBurning tokens to reduce supply
   • CSelling tokens to the public through an exchange
   • DDistributing free tokens to a targeted group of users to promote adoption
   Reveal Solution Discussion Select an answer first
4. 48application · medium

   A consortium of healthcare providers wants to share patient records on a blockchain. They require strict access control, compliance with data protection regulations, and the ability to process a high volume of transactions. Which consensus mechanism is most suitable?

   • AProof of Stake (PoS)
   • BPractical Byzantine Fault Tolerance (PBFT)
   • CProof of Work (PoW)
   • DDelegated Proof of Stake (DPoS)
   Reveal Solution Discussion Select an answer first
5. 49foundation · easy

   Why is PBFT particularly suitable for permissioned blockchains?

   • AIt allows anyone to join the network without permission
   • BIt consumes no energy at all
   • CIt assumes a limited number of known participants, which reduces communication overhead
   • DIt does not require any form of identity verification
   Reveal Solution Discussion Select an answer first
6. 50expert · hard

   A decentralized finance (DeFi) platform is launching a governance token. The platform's success depends on active participation from users who provide liquidity and vote on proposals. However, the team is concerned that a small number of large token holders could dominate governance. Which token design best balances participation and decentralization?

   • AAllow only the founding team to vote on proposals
   • BImplement a quadratic voting system where the cost of additional votes increases quadratically, and distribute tokens to users based on their contribution to the platform
   • CUse a delegated voting system where users can delegate their votes to a few large holders
   • DGive each token holder one vote per token, with no restrictions
   Reveal Solution Discussion Select an answer first