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