Blockchain Consensus Mechanisms BFC Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In Proof of Stake (PoS), what determines a validator's chance of being selected to propose the next block?

   • AThe number of coins they hold and are willing to lock up as collateral
   • BThe speed of their internet connection
   • CThe number of transactions they have previously validated
   • DThe amount of computational power they contribute to the network
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Which property of a consensus mechanism ensures that the network continues to add new blocks and process transactions even if some nodes are faulty or offline?

   • ASafety
   • BLiveness
   • CFinality
   • DFault tolerance
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   In the context of consensus design, what is a common trade-off when a network prioritizes high transaction throughput?

   • AIt has no impact on decentralization or security
   • BIt requires more computational power, making it less energy-efficient
   • CIt always increases the security of the network
   • DIt often requires a smaller number of validators, which can reduce decentralization
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A government agency is deploying a blockchain for land registry records. They need a consensus mechanism that is energy-efficient, provides fast finality, and allows only approved government entities to validate transactions. Which mechanism should they select?

   • AProof of Work (PoW)
   • BProof of Stake (PoS)
   • CDelegated Proof of Stake (DPoS)
   • DProof of Authority (PoA)
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A group of 10 banks is setting up a shared ledger for syndicated loans. Each bank runs a node, and they need to agree on the order of loan payments. One bank's node sends conflicting messages to different peers about the same payment. What property of the consensus mechanism directly addresses this issue?

   • ALiveness, which ensures the network continues to produce new blocks
   • BSafety, which ensures no two honest nodes disagree on the order of transactions
   • CFault tolerance, which ensures the network operates despite faulty nodes
   • DFinality, which ensures transactions are irreversible once confirmed
   Reveal Solution Discussion Select an answer first