Block Chain MCQs#1. What is the primary purpose of a blockchain in a decentralized network? To provide security and authentication To provide security and authentication To record and verify transactions To record and verify transactions To regulate cryptocurrency markets To regulate cryptocurrency markets To create a central authority To create a central authority To increase transaction costs To increase transaction costs #2. Which consensus algorithm is commonly used in blockchain networks? Proof of Work (PoW) Proof of Work (PoW) Proof of Stake (PoS) Proof of Stake (PoS) Proof of Authority (PoA) Proof of Authority (PoA) Proof of Transaction (PoT) Proof of Transaction (PoT) Proof of Immutability (PoI) Proof of Immutability (PoI) #3. What is the main advantage of a public blockchain compared to a private one? High scalability High scalability Greater control over who participates Greater control over who participates Enhanced privacy Enhanced privacy Improved performance Improved performance Open and transparent for anyone to join Open and transparent for anyone to join #4. Which term refers to the process of combining multiple transactions into a single block on a blockchain? Transaction Bundling Transaction Bundling Block Merging Block Merging Transaction Aggregation Transaction Aggregation Block Compiling Block Compiling Transaction Pooling Transaction Pooling #5. What is the purpose of a cryptographic hash function in blockchain technology? Data encryption Data encryption Data compression Data compression Data validation Data validation Data obfuscation Data obfuscation Data authentication Data authentication Download as PDFRelated posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQs#6. In a blockchain, what is the role of a node? Validate transactions and maintain a copy of the ledger Validate transactions and maintain a copy of the ledger Mine new blocks and create new coins Mine new blocks and create new coins Create and verify smart contracts Create and verify smart contracts Facilitate peer-to-peer transactions Facilitate peer-to-peer transactions Conduct security audits Conduct security audits #7. Which type of blockchain allows anyone to read, send transactions, and participate in the consensus process? Public Public Private Private Consortium Consortium Permissioned Permissioned Hybrid Hybrid #8. What is a smart contract in the context of blockchain? A legally binding agreement written in code A legally binding agreement written in code A complex encryption algorithm A complex encryption algorithm A secure way to store private keys A secure way to store private keys A type of consensus mechanism A type of consensus mechanism A type of blockchain token A type of blockchain token #9. Which blockchain platform is known for enabling the creation of decentralized applications (DApps)? Ethereum Ethereum Bitcoin Bitcoin Ripple Ripple Litecoin Litecoin Cardano Cardano #10. What is a fork in the context of blockchain technology? A type of consensus algorithm A type of consensus algorithm A software update for a blockchain A software update for a blockchain A cryptographic hash function A cryptographic hash function A form of public-private key pair A form of public-private key pair A digital signature A digital signature Download as PDFRelated posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQs#11. What does the term "double-spending" refer to in the context of cryptocurrencies? Spending the same cryptocurrency twice Spending the same cryptocurrency twice Spending a large amount of cryptocurrency Spending a large amount of cryptocurrency Spending cryptocurrency on luxury items Spending cryptocurrency on luxury items Spending cryptocurrency on investments Spending cryptocurrency on investments Spending cryptocurrency on necessities Spending cryptocurrency on necessities #12. What is the purpose of a private key in cryptocurrency transactions? To verify ownership and authorize transactions To verify ownership and authorize transactions To encrypt and secure the transaction To encrypt and secure the transaction To broadcast the transaction to the network To broadcast the transaction to the network To generate a public address To generate a public address To verify the transaction history To verify the transaction history #13. Which consensus algorithm aims to achieve consensus through a combination of proof of work and proof of stake? Delegated Proof of Stake (DPoS) Delegated Proof of Stake (DPoS) Practical Byzantine Fault Tolerance (PBFT) Practical Byzantine Fault Tolerance (PBFT) Delegated Byzantine Fault Tolerance (dBFT) Delegated Byzantine Fault Tolerance (dBFT) Proof of Burn (PoB) Proof of Burn (PoB) Proof of Activity (PoA) Proof of Activity (PoA) #14. What is a genesis block in the context of blockchain technology? The first block in a blockchain The first block in a blockchain A specialized mining hardware A specialized mining hardware A type of cryptographic hash function A type of cryptographic hash function The highest value cryptocurrency The highest value cryptocurrency A form of private key A form of private key #15. Which term refers to the process of distributing new cryptocurrency coins to the network? Mining Mining Staking Staking Minting Minting Forging Forging Validating Validating Download as PDFRelated posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQs#16. What is the primary function of a blockchain explorer? To view and analyze blockchain transactions To view and analyze blockchain transactions To mine new blocks To mine new blocks To create smart contracts To create smart contracts To secure private keys To secure private keys To validate consensus rules To validate consensus rules #17. Which blockchain platform is specifically designed for enterprise-level applications? Hyperledger Fabric Hyperledger Fabric EOS EOS TRON TRON Stellar Stellar NEO NEO #18. In blockchain technology, what is the purpose of a Merkle tree? To efficiently verify the contents of a block To efficiently verify the contents of a block To encrypt the data in a block To encrypt the data in a block To create a digital signature To create a digital signature To facilitate peer-to-peer transactions To facilitate peer-to-peer transactions To validate the consensus algorithm To validate the consensus algorithm #19. Which type of blockchain is controlled by a single entity or organization? Private Private Public Public Consortium Consortium Permissioned Permissioned Hybrid Hybrid #20. What is a permissioned blockchain? A blockchain that requires authorization to join A blockchain that requires authorization to join A blockchain that requires permission to read A blockchain that requires permission to read A blockchain that requires a private key for access A blockchain that requires a private key for access A blockchain that requires a special license to operate A blockchain that requires a special license to operate A blockchain that requires a specific token to participate A blockchain that requires a specific token to participate Download as PDFRelated posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQsNextResults Download as PDFRelated posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQs Download as PDFRelated posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQs Download as PDFShare this:Click to share on Facebook (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Related posts:Big Data MCQsCloud Computing MCQsMachine Learning MCQsComputer Organization and Architecture MCQs