A cross-border payment network needs to settle transactions in near real-time and cannot tolerate the risk of a temporary fork that later resolves. Which consensus property is most critical, and which mechanism provides it?

Probabilistic finality; Proof of Stake

High throughput; Delegated Proof of Stake

Immediate finality; Practical Byzantine Fault Tolerance

Energy efficiency; Proof of Work

A company is choosing between DPoS and PBFT for a new blockchain. They value decentralization and community governance, but they also need immediate finality for financial transactions. Which consensus mechanism should they choose?

PoW, because it provides both decentralization and immediate finality

PBFT, because it provides immediate finality and allows community governance

DPoS, because it provides immediate finality

A hybrid of DPoS for governance and PBFT for finality

A financial regulator requires that all transactions on a blockchain be irreversible once a certain number of confirmations is reached. A company is choosing between PoW and PoS. Which consensus mechanism is more aligned with this regulatory requirement, and why?

PoS, because the cost of a reorg is independent of confirmations

PoW, because it provides immediate finality

PoW, because the cost of a reorg increases with confirmations

PoS, because it provides immediate finality

A fintech company is deploying a permissioned blockchain for asset tokenization. They expect to have 50 nodes initially and plan to grow to 200 nodes. They need to maintain high throughput and low latency. Which consensus mechanism should they choose?

PBFT, because it provides immediate finality

Raft, because it is simple and efficient

BFT-based DPoS, because it scales to 200 nodes while maintaining BFT security

PoW, because it is secure and decentralized

A remittance company is comparing PoW and PoS for a new public blockchain. They want to minimize the environmental impact and also ensure that transactions are not reverted after a certain number of confirmations. Which consensus mechanism should they choose?

Delegated Proof of Stake (DPoS)

Practical Byzantine Fault Tolerance (PBFT)

EC-CouncilBlockchain Fintech Certification

Domain 2Objective 5

Choosing the Right Consensus for Blockchain Systems BFC Practice Questions (Page 5)

Part of the Consensus Mechanisms for Financial Systems domain, which makes up ~11% of our current practice bank.

33questions here

7free pages

5concepts

Questions 21–25

21application · medium
A cross-border payment network needs to settle transactions in near real-time and cannot tolerate the risk of a temporary fork that later resolves. Which consensus property is most critical, and which mechanism provides it?
Select an answer first
22expert · hard
A company is choosing between DPoS and PBFT for a new blockchain. They value decentralization and community governance, but they also need immediate finality for financial transactions. Which consensus mechanism should they choose?
Select an answer first
23expert · hard
A financial regulator requires that all transactions on a blockchain be irreversible once a certain number of confirmations is reached. A company is choosing between PoW and PoS. Which consensus mechanism is more aligned with this regulatory requirement, and why?
Select an answer first
24expert · hard
A fintech company is deploying a permissioned blockchain for asset tokenization. They expect to have 50 nodes initially and plan to grow to 200 nodes. They need to maintain high throughput and low latency. Which consensus mechanism should they choose?
Select an answer first
25application · medium
A remittance company is comparing PoW and PoS for a new public blockchain. They want to minimize the environmental impact and also ensure that transactions are not reverted after a certain number of confirmations. Which consensus mechanism should they choose?
Select an answer first

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