Block Chain MCQs

#1. Which type of blockchain allows only specific participants to read, send transactions, and participate in the consensus process?

Permissioned

Public

Consortium

Private

Hybrid

#2. What is the function of a cryptographic signature in a blockchain transaction?

To prove the authenticity of the transaction

To encrypt transaction data

To adjust the difficulty of mining

To create a digital ledger

To validate the consensus algorithm

#3. Which blockchain platform is designed for creating and managing digital identities?

Sovrin

EOS

TRON

Cardano

NEO

#4. What is the purpose of a “gas limit” in the Ethereum blockchain?

To specify the maximum amount of gas that can be spent on a transaction

To adjust the difficulty of mining

To validate the consensus algorithm

To facilitate peer-to-peer transactions

To create and verify smart contracts

#5. What is the role of a “watch-only wallet” in cryptocurrency storage?

To monitor the balance and transactions of an address without having access to its private key

To mine new blocks

To create smart contracts

To facilitate peer-to-peer transactions

To validate consensus rules

#6. Which consensus algorithm aims to achieve consensus through a round-robin process of block validation?

Proof of Authority (PoA)

Practical Byzantine Fault Tolerance (PBFT)

Delegated Proof of Stake (DPoS)

Proof of Burn (PoB)

Proof of Activity (PoA)

#7. What is the primary benefit of using a hybrid blockchain over a public or private one?

Combines the benefits of both public and private blockchains

High scalability

Enhanced privacy

Improved performance

Open and transparent for anyone to join

#8. Which blockchain platform is designed for facilitating the creation of non-fungible tokens (NFTs)?

Ethereum

Bitcoin

Ripple

Litecoin

Binance Smart Chain (BSC)

#9. What is the purpose of a “timestamp” in a blockchain transaction?

To record the exact time a transaction occurs

To encrypt transaction data

To adjust the difficulty of mining

To create a digital signature

To validate the consensus algorithm

#10. What is the primary function of a cryptocurrency wallet?

To store and manage cryptocurrency assets

To mine new blocks

To create smart contracts

To facilitate peer-to-peer transactions

To validate consensus rules

#11. Which consensus algorithm aims to achieve consensus by allowing any participant to create and validate blocks?

Proof of Activity (PoA)

Proof of Burn (PoB)

Proof of Work (PoW)

Proof of Stake (PoS)

Proof of Authority (PoA)

#12. What is the purpose of a “block reward” in a blockchain network?

To incentivize miners to secure the network

To encrypt transaction data

To adjust the difficulty of mining

To create a digital signature

To validate the consensus algorithm

#13. Which blockchain platform is known for its focus on enabling interoperability between different blockchains?

Polkadot

Bitcoin

Ethereum

Ripple

Tezos

#14. What is the primary advantage of using blockchain technology in healthcare?

Improved security and integrity of patient data

Decreased privacy for patients

Lower operational costs

Slower data processing

Centralized control

#15. What is the purpose of a “state trie” in the Ethereum blockchain?

To store the current state of all accounts

To adjust the difficulty of mining

To validate the consensus algorithm

To facilitate peer-to-peer transactions

To create and verify smart contracts

#16. Which blockchain platform is specifically designed for creating and managing decentralized finance (DeFi) applications?

Binance Smart Chain (BSC)

EOS

Stellar

NEO

Tezos

#17. What is the main advantage of using a consortium blockchain compared to a private one?

Greater transparency and trust among a group of known participants

High scalability

Enhanced privacy

Improved performance

Open and transparent for anyone to join

#18. In a blockchain network, what is the purpose of a “mempool”?

Temporary storage for pending transactions

To encrypt transaction data

To adjust the difficulty of mining

To create a digital signature

To validate the consensus algorithm

#19. What is the function of a “block header” in a blockchain?

It contains metadata about a block

It encrypts the data in a block

It creates a digital signature

It facilitates peer-to-peer transactions

It validates the consensus algorithm

#20. Which blockchain platform is known for its focus on facilitating the Internet of Things (IoT) applications?

IOTA

Bitcoin

Ethereum

Ripple

Stellar

#1. Which type of blockchain allows only specific participants to read, send transactions, and participate in the consensus process?

#2. What is the function of a cryptographic signature in a blockchain transaction?

#3. Which blockchain platform is designed for creating and managing digital identities?

#4. What is the purpose of a “gas limit” in the Ethereum blockchain?

#5. What is the role of a “watch-only wallet” in cryptocurrency storage?

#6. Which consensus algorithm aims to achieve consensus through a round-robin process of block validation?

#7. What is the primary benefit of using a hybrid blockchain over a public or private one?

#8. Which blockchain platform is designed for facilitating the creation of non-fungible tokens (NFTs)?

#9. What is the purpose of a “timestamp” in a blockchain transaction?

#10. What is the primary function of a cryptocurrency wallet?

#11. Which consensus algorithm aims to achieve consensus by allowing any participant to create and validate blocks?

#12. What is the purpose of a “block reward” in a blockchain network?

#13. Which blockchain platform is known for its focus on enabling interoperability between different blockchains?

#14. What is the primary advantage of using blockchain technology in healthcare?

#15. What is the purpose of a “state trie” in the Ethereum blockchain?

#16. Which blockchain platform is specifically designed for creating and managing decentralized finance (DeFi) applications?

#17. What is the main advantage of using a consortium blockchain compared to a private one?

#18. In a blockchain network, what is the purpose of a “mempool”?

#19. What is the function of a “block header” in a blockchain?

#20. Which blockchain platform is known for its focus on facilitating the Internet of Things (IoT) applications?

Results