Uncategorized Blockchain Screen Test by mfh.officials@gmail.com Jan 7, 2025 0 Comment Blockchain Screening Test 1 / 20 Which of the following is an example of an enterprise blockchain platform? Litecoin Ethereum Hyperledger Fabric Bitcoin 2 / 20 Which of the following is a feature of "permissioned" blockchain networks? Transactions are anonymous and untraceable They use Proof of Work as the consensus mechanism They are completely public and accessible by anyone Only authorized participants can access and validate the blockchain 3 / 20 In which of the following situations is blockchain most useful? Sending unencrypted email messages Making high-frequency trades in financial markets Managing cloud storage infrastructure Storing data in a decentralized and tamper-proof manner 4 / 20 Which of the following is a type of blockchain that only allows authorized participants to join? Consortium Blockchain Private Blockchain Hybrid Blockchain Public Blockchain 5 / 20 What is the role of miners in a blockchain network? To stake cryptocurrency in the network To create new cryptocurrencies To validate and verify transactions To create new blocks only in private blockchains 6 / 20 Which of the following is an example of a blockchain that uses the Proof of Stake (PoS) consensus mechanism? Bitcoin Litecoin Ethereum 2.0 Ripple 7 / 20 Which cryptographic technique is used to ensure the integrity and security of transactions in blockchain? AES Encryption RSA Encryption Public Key Cryptography Hashing 8 / 20 What is the role of a "block header" in a blockchain? To hold the public keys of participants To identify the previous block and provide metadata for the current block To store the transactions within a block To store user information 9 / 20 Which of the following blockchain platforms was created specifically for creating enterprise solutions and is not primarily a cryptocurrency? Hyperledger Bitcoin Ethereum Ripple 10 / 20 What is the term used to refer to a public key used in blockchain systems? Private Key Transaction Key Public Address Blockchain Key 11 / 20 What is the primary purpose of a "wallet" in blockchain systems? To mine new blocks To store cryptocurrency and public/private keys To provide encryption to the blockchain network To validate transactions 12 / 20 In blockchain, what is the term used for a block that has been successfully added to the chain? Transaction Block confirmation Hash Node 13 / 20 Which type of attack involves a malicious actor gaining control of more than 50% of a blockchain's network nodes to manipulate the ledger? Sybil Attack 51% Attack Eclipse Attack Double-spending Attack 14 / 20 Which of the following is NOT a consensus mechanism in blockchain? Proof of Authority (PoA) Proof of Work (PoW) Proof of Transaction (PoT) Proof of Stake (PoS) 15 / 20 What is the main purpose of a "smart contract" in blockchain technology? To facilitate, verify, and enforce the terms of a contract automatically To act as a database To ensure scalability in blockchain networks To provide encryption for all transactions 16 / 20 What is the term for a digital representation of assets or value that exists on a blockchain? Ledger Cryptocurrency Token Coin 17 / 20 Which of the following is the primary feature of blockchain technology? Limited scalability Centralized control High transaction fees Decentralized and immutable ledger 18 / 20 What is the term for a decentralized application (dApp) built on a blockchain platform? Smart Contract Distributed Ledger Blockchain Application Blockchain Node 19 / 20 Which consensus mechanism is used by Bitcoin to validate transactions? Proof of Authority (PoA) Proof of Work (PoW) Delegated Proof of Stake (DPoS) Proof of Stake (PoS) 20 / 20 Which blockchain platform is primarily used for creating and managing smart contracts and decentralized applications (dApps)? Ripple Bitcoin Ethereum Litecoin Your score isThe average score is 50% 0% Restart quiz
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