BLOCKCHAIN MULTIPLE CHOICE QUESTION MCQ - 2
Modified Date:- Published Date:-Categories: Blockchain BLOCKCHAIN
1. A popular public-private key implementation known as Rivest-Shamir Adelman (RSA) algorithm is used for the Bitcoin and Ethereum Blockchain. A) False B) True Answer: A) False 2. For the simple symmetric key example discussed in the lecture, it is easy to derive the secret key from the encrypted data. A) True B) False Answer: A) True 3. What type of hash is used when there is a fixed number of items to be hashed, such as the items in a block header, and we are verifying the composite block integrity? A) Tree-structured Hash B) Complex hash C) Simple Hash D) Either Answer: C) Simple Hash 4. What type of hash function is used, when there is a variable number of items to be hashed, such as the many state changes in a block? A) Complex hash B) Simple Hash C) Tree-structured Hash D) Either Answer: C) Tree-structured Hash 5. The transaction Merkle Tree root value in a Bitcoin block is calculated using, A) Hash of transactions B) Previous block's hash C) Number of transactions D) None of the above Answer: A) Hash of transactions 6. What is a DApp? A) A type of cryptocurrency B) A condiment C) A type of blockchain D) A decentralized application Answer: D) A decentralized application 7. Hash identifying each block in the blockchain is generated using which of the following cryptographic algorithm? A) SHA128 B) SHA256 C) Both of them D) None of them Answer: B) SHA256 8. How often does the Bitcoin ledger reconcile? A) Every day B) Every 3 months C) Every 3 minutes D) Every 10 minutes Answer: B) Every 3 months 9. Which is/are the applications of Blockchain? A) Cross-border payments B) Anti-money laundering tracking system C) Supply chain and logistics monitoring C) All the above Answer: D) All the above 10. What is a smart contract? A) Programs stored on a blockchain that run when predetermined conditions are met B) Online contract C) Digital contract D) All the above Answer: A) Programs stored on a blockchain that run when predetermined conditions are met 11. Bitcoin is a solution to the double-spend problem? A) True B) False C) Sometimes D) None of the above Answer: A) True 12. Blockchain is a ______ ? A) Push technology B) Pull technology C) Both push and pull technology D) None of the above Answer: A) Push technology 13. What is a miner? A) A type of blockchain B) An algorithm that predicts the next part of the chain C) A person doing calculations to verify a transaction D) Computers that validate and process blockchain transactions Answer: D) Computers that validate and process blockchain transactions 14. Where is a Blockchain’s central server? A) Where the blockchain is created B) Located with the owner of the server C) There is no central server, it is distributed D) Ordered Node Answer: C) There is no central server, it is distributed 15. Transactions per second (TPS) for Proof-of-Work Blockchain are approximate? A) 24K per second B) 175K per second C) Only limited to the number of nodes on the network D) 7-15 per second Answer: D) 7-15 per second