Block Chain MCQs

#1. Which blockchain platform is known for its focus on providing privacy and anonymity in transactions?

Monero

Bitcoin

Ethereum

Litecoin

Ripple

#2. What is the purpose of a nonce in a proof of work consensus algorithm?

To adjust the difficulty of mining

To encrypt transaction data

To verify the transaction history

To generate a public address

To validate the consensus algorithm

#3. What is the function of a token in a blockchain ecosystem?

A digital asset representing ownership or utility

A cryptographic hash function

A form of private key

A type of consensus algorithm

A way to bundle transactions

#4. Which blockchain platform is designed for facilitating cross-border payments and remittances?

Ripple

Ethereum

Bitcoin

Stellar

EOS

#5. What is the purpose of a gas fee in the Ethereum blockchain?

To incentivize miners to process transactions

To validate the consensus algorithm

To facilitate peer-to-peer transactions

To create and verify smart contracts

To adjust the difficulty of mining

#6. What is the main advantage of a permissioned blockchain compared to a public one?

Greater control over who participates

High scalability

Enhanced privacy

Improved performance

Open and transparent for anyone to join

#7. Which blockchain platform uses the “Solidity” programming language for smart contract development?

Ethereum

Bitcoin

Ripple

Litecoin

Cardano

#8. What is a 51% attack in the context of blockchain security?

When an entity gains control of over 50% of the network's mining power

When an entity gains control of over 50% of the network's nodes

When an entity successfully hacks a smart contract

When an entity controls 51% of the cryptocurrency supply

When an entity achieves 51% consensus in a consortium blockchain

#9. Which consensus algorithm aims to achieve consensus by ensuring that each node in the network has an equal chance of validating a block?

Proof of Work (PoW)

Proof of Stake (PoS)

Proof of Authority (PoA)

Proof of Burn (PoB)

Proof of Activity (PoA)

#10. What is the purpose of a cold wallet in cryptocurrency storage?

To store cryptocurrency offline and protect it from hacking

To mine new blocks

To create smart contracts

To facilitate peer-to-peer transactions

To validate consensus rules

#11. Which type of attack involves flooding a network with a large volume of transactions to overwhelm its capacity?

Denial of Service (DoS)

Sybil Attack

51% Attack

Eclipse Attack

Double-Spending Attack

#12. What is the function of a “soft fork” in blockchain technology?

A backward-compatible upgrade to the protocol

A type of cryptographic hash function

A secure way to store private keys

A type of consensus mechanism

A type of blockchain token

#13. Which blockchain platform is designed for creating and executing smart contracts, particularly in enterprise settings?

Corda

Tezos

Truffle

VeChain

#14. What is the role of a validator in a proof of stake consensus algorithm?

To create new blocks and validate transactions

To mine new blocks

To validate the consensus algorithm

To generate a public address

To secure private keys

#15. What is the primary benefit of using a consortium blockchain over a public one?

Greater control and privacy for a group of known participants

High scalability

Enhanced security and transparency

Improved performance

Open and transparent for anyone to join

#16. What is the purpose of a consensus algorithm in a blockchain network?

To achieve agreement on the state of the ledger

To encrypt transaction data

To adjust the difficulty of mining

To create a digital signature

To validate the consensus rules

#17. What does the term “immutable” mean in the context of blockchain technology?

Unable to be changed or altered

Easily modifiable

Highly scalable

Rapidly evolving

Centralized and controlled

#18. Which blockchain platform is known for its focus on facilitating supply chain management?

VeChain

Bitcoin

Ethereum

Stellar

NEO

#19. What is the primary advantage of using a blockchain for supply chain management?

Increased transparency and traceability

Decreased security risks

Lower operational costs

Faster transaction processing

Centralized control

#20. What is the purpose of a “hard fork” in blockchain technology?

A non-backward-compatible upgrade to the protocol

A type of cryptographic hash function

A secure way to store private keys

A type of consensus mechanism

A type of blockchain token

#1. Which blockchain platform is known for its focus on providing privacy and anonymity in transactions?

#2. What is the purpose of a nonce in a proof of work consensus algorithm?

#3. What is the function of a token in a blockchain ecosystem?

#4. Which blockchain platform is designed for facilitating cross-border payments and remittances?

#5. What is the purpose of a gas fee in the Ethereum blockchain?

#6. What is the main advantage of a permissioned blockchain compared to a public one?

#7. Which blockchain platform uses the “Solidity” programming language for smart contract development?

#8. What is a 51% attack in the context of blockchain security?

#9. Which consensus algorithm aims to achieve consensus by ensuring that each node in the network has an equal chance of validating a block?

#10. What is the purpose of a cold wallet in cryptocurrency storage?

#11. Which type of attack involves flooding a network with a large volume of transactions to overwhelm its capacity?

#12. What is the function of a “soft fork” in blockchain technology?

#13. Which blockchain platform is designed for creating and executing smart contracts, particularly in enterprise settings?

#14. What is the role of a validator in a proof of stake consensus algorithm?

#15. What is the primary benefit of using a consortium blockchain over a public one?

#16. What is the purpose of a consensus algorithm in a blockchain network?

#17. What does the term “immutable” mean in the context of blockchain technology?

#18. Which blockchain platform is known for its focus on facilitating supply chain management?

#19. What is the primary advantage of using a blockchain for supply chain management?

#20. What is the purpose of a “hard fork” in blockchain technology?

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