Choosing the Right Consensus for Blockchain Systems BFC Practice Questions (Page 7)

Questions 31–33

1. 31application · medium

   A financial institution is required by regulators to provide an immutable audit trail of transactions. They are considering a permissioned blockchain with PBFT. Which property of PBFT directly supports this regulatory requirement?

   • AProbabilistic finality
   • BHigh energy consumption
   • COpen participation
   • DImmediate finality
   Reveal Solution Discussion Select an answer first
2. 32foundation · easy

   A public blockchain for a decentralized application (dApp) needs to be open to anyone and minimize energy consumption. Which consensus mechanism is the best fit?

   • ADelegated Proof of Stake (DPoS)
   • BProof of Work (PoW)
   • CProof of Stake (PoS)
   • DPractical Byzantine Fault Tolerance (PBFT)
   Reveal Solution Discussion Select an answer first
3. 33expert · hard

   A global remittance company is designing a blockchain for cross-border payments. They have two options: a public PoS network with high decentralization but variable latency, or a permissioned PBFT network with low latency but limited decentralization. The company must comply with anti-money laundering (AML) regulations that require transaction monitoring and the ability to freeze suspicious accounts. Which approach is more appropriate?

   • APermissioned PBFT network with public transparency
   • BPublic PoS network with a secondary compliance layer
   • CPermissioned PBFT network, because it allows the company to implement AML controls and freeze accounts
   • DPublic PoS network, because it provides transparency and decentralization
   Reveal Solution Discussion Select an answer first