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