A financial institution is evaluating blockchain platforms for a carbon-credit trading system. They have a corporate sustainability mandate to minimize energy consumption. Which consensus mechanism should they avoid due to its high energy consumption?

Practical Byzantine Fault Tolerance (PBFT)

Delegated Proof of Stake (DPoS)

A blockchain network using Proof of Stake is facing a security issue where validators are signing blocks on multiple forks simultaneously, hoping to maximize their rewards regardless of which fork becomes canonical. This behavior undermines the security of the network. What is the most effective countermeasure?

Increase the block reward to incentivize honest behavior

Reduce the number of validators

Implement slashing conditions that penalize validators who sign conflicting blocks

A blockchain network used for securities settlement is facing a governance crisis. A faction of validators wants to increase the block size to improve throughput, while another faction wants to keep the block size small to maintain decentralization. The two groups cannot agree, and a hard fork is imminent. What is the most effective way to resolve this governance dispute?

Have the core developers unilaterally decide the block size

Keep the block size unchanged and ignore the throughput concerns

Implement an on-chain governance mechanism where token holders vote on the proposal

Let the two factions each run their own fork and let the market decide

Which consensus mechanism is generally known for having the lowest transaction throughput and highest latency, making it less suitable for high-frequency financial applications?

Delegated Proof of Stake (DPoS)

Practical Byzantine Fault Tolerance (PBFT)

EC-CouncilBlockchain Fintech Certification

Domain 2Objective 6

Challenges in Blockchain Consensus Mechanisms BFC Practice Questions (Page 8)

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

41questions here

9free pages

8concepts

Questions 36–40

36application · easy
A financial institution is evaluating blockchain platforms for a carbon-credit trading system. They have a corporate sustainability mandate to minimize energy consumption. Which consensus mechanism should they avoid due to its high energy consumption?
Select an answer first
37expert · hard
A blockchain network using Proof of Stake is facing a security issue where validators are signing blocks on multiple forks simultaneously, hoping to maximize their rewards regardless of which fork becomes canonical. This behavior undermines the security of the network. What is the most effective countermeasure?
Select an answer first
38application · medium
A blockchain network used for securities settlement is facing a governance crisis. A faction of validators wants to increase the block size to improve throughput, while another faction wants to keep the block size small to maintain decentralization. The two groups cannot agree, and a hard fork is imminent. What is the most effective way to resolve this governance dispute?
Select an answer first
39application · easy
A mining company is evaluating the economic viability of switching from Proof of Work (PoW) to Proof of Stake (PoS) for a new blockchain project. Which factor is most likely to reduce their operational costs?
Select an answer first
40foundation · easy
Which consensus mechanism is generally known for having the lowest transaction throughput and highest latency, making it less suitable for high-frequency financial applications?
Select an answer first

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Challenges in Blockchain Consensus Mechanisms BFC Practice Questions (Page 8)

Questions 36–40

A financial institution is evaluating blockchain platforms for a carbon-credit trading system. They have a corporate sustainability mandate to minimize energy consumption. Which consensus mechanism should they avoid due to its high energy consumption?

A mining company is evaluating the economic viability of switching from Proof of Work (PoW) to Proof of Stake (PoS) for a new blockchain project. Which factor is most likely to reduce their operational costs?

Which consensus mechanism is generally known for having the lowest transaction throughput and highest latency, making it less suitable for high-frequency financial applications?

Keep studying — Consensus Mechanisms for Financial Systems