Blockchain Technology Quiz PDF

Blockchain Technology: 30-Item Quiz =================================== 1\. What is the main feature of blockchain that ensures data cannot be altered once added? A. Decentralization B. Immutability C. Transparency D. Scalability 2\. In blockchain, what is a node? A. A central governing autho...

Blockchain Technology: 30-Item Quiz =================================== 1\. What is the main feature of blockchain that ensures data cannot be altered once added? A. Decentralization B. Immutability C. Transparency D. Scalability 2\. In blockchain, what is a node? A. A central governing authority B. A computer that stores blockchain data C. A hashing algorithm D. A smart contract 3\. Which of the following best describes a decentralized blockchain system? A. Data is stored on a single central server B. Data is shared among all participating nodes without a central authority C. Only selected users can access the blockchain D. Transactions are controlled by a governing body 4\. What key feature of blockchain uses private and public keys for security? A. Hashing B. Encryption C. Smart Contracts D. Consensus Algorithms 5\. What does Proof of Work (PoW) require participants to do? A. Solve mathematical puzzles to validate transactions B. Hold a specific amount of cryptocurrency C. Create digital signatures for transactions D. Use a private blockchain for security 6\. Which type of blockchain is used in a closed network for organizations? A. Public Blockchain B. Private Blockchain C. Hybrid Blockchain D. Consortium Blockchain 7\. What is hashing in blockchain technology? A. Encrypting data bidirectionally B. Converting data into a unique string of characters C. Verifying digital signatures D. Executing smart contracts automatically 8\. Which blockchain consensus algorithm assigns validation based on coin ownership? A. Proof of Work (PoW) B. Proof of Stake (PoS) C. Byzantine Fault Tolerance D. Delegated Proof of Stake 9\. What is a smart contract in blockchain? A. A private key used to encrypt transactions B. A peer-to-peer protocol for communication C. Code that defines and executes contract terms automatically D. A hashing function used to verify data 10\. Which of the following platforms is known for cross-border payments? A. IBM Blockchain B. Tron C. Stellar D. Ethereum