Consensus Mechanism Comparison for Blockchain: A Comprehensive Guide

Question 1

Which consensus mechanism is known for its high energy consumption and reliance on computational power?

Accepted Answer

Proof of Work

Answer

Proof of Stake

Answer

Byzantine Fault Tolerance

Answer

Delegated Proof of Stake

Question 2

What is a fundamental distinction between Proof of Work (PoW) and Proof of Stake (PoS) consensus mechanisms?

Accepted Answer

PoW involves miners solving complex puzzles, while PoS involves validators staking crypto tokens.

Answer

PoS is inherently more scalable than PoW.

Answer

PoS offers stronger security guarantees than PoW.

Answer

PoW is exclusive to Bitcoin, while PoS is exclusive to Ethereum.

Question 3

Which consensus mechanism requires block producers to stake their tokens to secure the network?

Accepted Answer

Proof-of-Stake

Answer

Proof-of-Authority

Answer

Proof-of-Burn

Answer

Proof-of-Work

Question 4

Which consensus mechanism employs trusted entities to validate transactions on the blockchain?

Accepted Answer

Proof-of-Authority

Answer

Proof-of-Work

Answer

Proof-of-Stake

Question 5

Which consensus mechanism is known for its high energy consumption due to its reliance on computational power?

Accepted Answer

Proof-of-Work

Answer

Proof-of-Stake

Answer

Delegated Proof-of-Stake

Question 6

Which consensus mechanism allows validators to delegate their voting power to others?

Accepted Answer

Delegated Proof-of-Stake

Answer

Proof-of-Authority

Answer

Proof-of-Burn

Answer

Proof-of-Stake

Question 7

Which consensus mechanism is an energy-efficient alternative to Proof-of-Work that utilizes storage space instead of computational power?

Accepted Answer

Proof-of-Space

Answer

Proof-of-Stake

Answer

Proof-of-Elapsed-Time

Answer

Proof-of-Authority

Question 8

Which consensus mechanism is suitable for Internet of Things (IoT) devices due to its low computational and energy requirements?

Accepted Answer

Proof-of-Elapsed-Time

Answer

Proof-of-Work

Answer

Proof-of-Stake

Answer

Proof-of-Authority

Question 9

Which consensus mechanism is characterized by energy-intensive computational processes employed by miners to validate transactions and add new blocks to the blockchain?

Accepted Answer

Proof-of-Work (PoW)

Answer

Proof-of-Importance (PoI)

Answer

Proof-of-Storage (PoSt)

Answer

Delegated Proof-of-Stake (DPoS)

Question 10

Which consensus mechanism relies on participants pledging their cryptocurrency holdings as a guarantee of their commitment to the blockchain network and their honest participation in the validation process?

Accepted Answer

Proof-of-Stake (PoS)

Answer

Proof-of-Authority (PoA)

Answer

Proof-of-Elapsed-Time (PoET)

Answer

Proof-of-Capacity (PoC)

Question 11

Which consensus mechanism is predominantly employed in permissioned blockchain networks, where a predefined set of nodes with established identities is responsible for validating transactions and maintaining the blockchain's integrity?

Accepted Answer

Proof-of-Authority (PoA)

Answer

Proof-of-Work (PoW)

Answer

Proof-of-Stake (PoS)

Answer

Delegated Proof-of-Stake (DPoS)

Question 12

Which consensus mechanism incorporates a voting system where the influence of each participant in the consensus process is proportionate to the amount of cryptocurrency they have staked?

Accepted Answer

Delegated Proof-of-Stake (DPoS)

Answer

Proof-of-Capacity (PoC)

Answer

Proof-of-Burn (PoB)

Answer

Proof-of-Importance (PoI)

Question 13

Which consensus mechanism prioritizes high levels of security by requiring significant computational effort in the mining process, resulting in a substantial expenditure of energy?

Accepted Answer

Proof-of-Work (PoW)

Answer

Proof-of-Authority (PoA)

Answer

Proof-of-Stake (PoS)

Question 14

Which consensus mechanism is commonly criticized for its excessive energy consumption, primarily due to the intensive computational processes involved in validating transactions?

Accepted Answer

Proof-of-Work (PoW)

Answer

Proof-of-Authority (PoA)

Answer

Proof-of-Capacity (PoC)

Answer

Proof-of-Stake (PoS)

Question 15

Which consensus mechanism is employed by the Algorand blockchain and leverages a unique voting system to achieve consensus, ensuring that the probability of a particular node being selected to propose the next block is proportional to its stake?

Accepted Answer

Pure Proof-of-Stake (PPoS)

Answer

Nakamoto Consensus

Answer

Delegated Proof-of-Importance (DPoI)

Answer

Proof-of-Burn (PoB)

Question 16

Which consensus mechanism employs a weighted voting system where participants' influence is proportional to their stake ownership?

Accepted Answer

Delegated Proof-of-Stake (DPoS)

Answer

Proof-of-Capacity (PoC)

Answer

Proof-of-Burn (PoB)

Answer

Proof-of-Authority (PoA)

Question 17

Which consensus mechanism is prevalent in permissioned blockchains, where participant identities are known?

Accepted Answer

Proof-of-Authority (PoA)

Answer

Delegated Proof-of-Stake (DPoS)

Answer

Proof-of-Stake (PoS)

Answer

Proof-of-Work (PoW)

Question 18

Which consensus mechanism operates on a fixed time interval, generating blocks at predetermined intervals?

Accepted Answer

Proof-of-Elapsed-Time (PoET)

Answer

Proof-of-Work (PoW)

Answer

Proof-of-Stake (PoS)

Answer

Delegated Proof-of-Stake (DPoS)

Question 19

Which consensus mechanism leverages a lottery system to randomly select block creators from the network?

Accepted Answer

Proof-of-Randomness (PoR)

Answer

Proof-of-Capacity (PoC)

Answer

Proof-of-Storage (PoS)

Question 20

Which consensus mechanism uses computationally intensive puzzles, leading to high energy consumption?

Accepted Answer

Proof-of-Work (PoW)

Answer

Delegated Proof-of-Stake (DPoS)

Answer

Practical Byzantine Fault Tolerance (PBFT)

Answer

Proof-of-Stake (PoS)

Question 21

In which consensus mechanism do validators get chosen based on the number of tokens they own, encouraging long-term network investment?

Accepted Answer

Proof-of-Stake (PoS)

Answer

Proof-of-Authority (PoA)

Answer

Proof-of-Work (PoW)

Answer

Directed Acyclic Graph (DAG)

Question 22

Which consensus mechanism is best suited for private or permissioned blockchains due to its reliance on a small group of pre-approved nodes for transaction validation?

Accepted Answer

Proof-of-Authority (PoA)

Answer

Proof-of-History (PoH)

Answer

Proof-of-Work (PoW)

Answer

Delegated Proof-of-Stake (DPoS)

Question 23

Which consensus mechanism achieves faster transaction processing by using a voting system where token holders elect representatives to validate blocks?

Accepted Answer

Delegated Proof-of-Stake (DPoS)

Answer

Proof-of-Stake (PoS)

Answer

Proof-of-Work (PoW)

Answer

Byzantine Fault Tolerance (BFT)

Question 24

Which consensus mechanism utilizes a verifiable delay function to create a tamper-proof historical record of events, ensuring the order of transactions?

Accepted Answer

Proof-of-History (PoH)

Answer

Proof-of-Elapsed Time (PoET)

Answer

Proof-of-Work (PoW)

Answer

Proof-of-Stake (PoS)

Question 25

A group of financial institutions needs a blockchain solution for real-time settlement that prioritizes high transaction throughput and low latency. Which consensus mechanism best fits this need?

Accepted Answer

Practical Byzantine Fault Tolerance (PBFT)

Answer

Delegated Proof-of-Stake (DPoS)

Answer

Proof-of-Work (PoW)

Answer

Proof-of-Stake (PoS)