BLOCKCHAIN MULTIPLE CHOICE QUESTION MCQ
Categories: BLOCKCHAIN
1. The height of the block is the ____ in the chain between it and the genesis block. A) Metadata that is B) Number of blocks C) Merkle tree hash C) Size of the memory cache Answer: B) Number of blocks 2. Which of the following problems did Blockchain solve for cryptocurrencies? A) Anonymity B) Double Spending C) Destination of currencies D) None of the above Answer: B) Double Spending 3. Blockchain does not provide? A) Security B) Immutability C) Fault tolerance D) Fast transaction time Answer: D) Fast transaction time 4. A contract in size is restricted to, A) 24576 Bytes B) 1 Kilo Bytes C) 23575 Bytes D) No limit Answer: A) 24576 Bytes 5. What is the purpose of a Nonce? A) Follows nouns B) A Hash Function C) Prevents Double Spending D) Send Information to the Blockchain Network Answer: C) Prevents Double Spending 6. What is cold storage? A) A place to Hang your Coat B) A private key connected to the internet C) A private key not connected to the internet D) A desktop wallet Answer: B) A private key connected to the internet 7. What powers the Ethereum Virtual Machine? A) Gas B) Ether C) Bitcoin D) Block Rewards Answer: A) Gas 8. What is Proof of Stake? A) A certificate needed to use the blockchain B) A password needed to access an exchange C) How private keys are made D) A transaction and Block Verification Protocol Answer: D) A transaction and Block Verification Protocol 9. What is Not a Ledger type considered by users in Blockchain? A) Distributed Ledger B) Decentralized Ledger C) Both A and B D) None of these Answer: D) None of these 10. What are mechanisms that allow tokens and other digital assets from one blockchain to be securely used in a separate blockchain called? A) Parachains B) Blockbabies C) Sidechains D) Altchains Answer: A) Parachains 11. If a hacker wanted to alter a blockchain, what percentage of the block copies would he have to alter? A) Only his copy B) 1% C) 51% D) 100% Answer: C) 51% 12. What biblical name is given to the first block in blockchain? A) Primal B) Origin C) Genesis D) Ada Answer: C) Genesis 13. Bitcoin is created by ______. A) Saifedean Ammius B) Satoshi Nakamoto C) Vitalik Buterin D) None of these Answer: B) Satoshi Nakamoto 14. Decentralized blockchains are immutable? A) True B) False C) Can be true or false D) Cannot say Answer: A) True 15. A blockchain is a type of? A) Object B) Database C) Table D) View Answer: B) Database