Welcome to your Blockchain Certified Prefessional - 1 Name Email Enter your DOB (dd/mm/yyyy) 1. Which of the following is popularly used for storing bitcoins? POCKET WALLET BOX STACK None 2. What time did Bitcoin Network Start? 2001 2008 2009 1999 None 3. What is the initial application for which Blockchain was designed? Peer-to-peer finance application Research Project Open source finance software to connect Banks None of these None 4. Which of the following is important for Blockchain? Database Security Auditing Planning None 5. What is the name of the research paper that brought Bitcoin to the world? White Paper Green Paper Black Paper Yellow Paper None 6. True or False: Blockchain is the same as Bitcoin. True False None 7. Once records are submitted on a blockchain, can they be altered? Yes – the parties can go back in and alter them at any time. Yes – but only within a certain time frame. No – they cannot be altered. None 8. What does P2P stand for? Password to Password Peer to Peer Product to Product Private Key to Public Key None 9. What is a node? A type of cryptocurrency A Blockchain A computer on a Blockchain network An exchange None 10. Who created Bitcoin? Satoshi Nakamoto Samsung John Mcafee China None 11. Where do you store your cryptocurrency? Bank account Floppy Disk Crypto Wallet In your pocket None 12. What is a miner? A type of blockchain An algorithm that predicts the next part of the chain A person doing calculations to verify a transaction Computers that validate and process blockchain transactions None 13. Where can you buy cryptocurrency? A private transaction An exchange A Bitcoin ATM All of the above None 14. What is a blockchain? A distributed ledger on a peer to peer network A type of cryptocurrency An exchange A centralized ledger None 15. What is a dApp? A type of Cryptocurrency A condiment A type of blockchain A decentralized application None 16. What is a genesis block? The first block of a Blockchain A famous block that hardcoded a hash of the Book of Genesis onto the blockchain The first block after each block halving The 2nd transaction of a Blockchain None 17. What is a private key? A key on your key chain A key given to the public A key NOT to be given to the public A key that opens a secret door None 18. What is Proof of Stake? A certificate needed to use the blockchain A password needed to access an exchange How private keys are made A transaction and block verification protocol None 19. What is immutability? Running without the concept of “human trust” Majority of the nodes need to come to a consensus Data in a block in a blockchain unchangeble Peer to peer digital ledger of transactions None 20. Which blockchain supports smart contracts? Bitcoin Hyperledger Fabric Ethereum Corda R3 None 21. How are blockchains linked? Connection A software Gum Cryptography None 22. What is KYC ? Know Yen Currency Knot in blockchain Know Your Customer Know Your Coin None 23. A blockchain is secured by PIN code 'hash' code password login None 24. Smart contracts are kept on the blockchain and are executed _____________ when a transaction is processed. Manually Automatically HR needs to process it None 25. Based on blockchain technology and secured by ____________ which makes it nearly impossible to counterfeit or double-spend Cryptography Bank ledger World bank None 26. Immutable data means? Data can be easily modified. Data is Vulnerable. Data is difficult is to change Data can be erased. None ____________is one of the safest methods for holding bitcoin, as these wallets are not accessible via the Internet. Computer Storage Leather Wallet Cold storage Pen Drive None 28. MetaMask can be used to store keys for ____________ cryptocurrencies only. Bitcoin Ethereum Facebook All None 29. What are the challenges & risk of blockchain? No Regulation – Risky environment Lack of Talent – Lack of expertise / developer in blockchain High Energy Consumption – Mining consuming high energy All the above None 30. There are different consensus algorithms. Examples of enterprise blockchain consensus algorithms as follows except Proof of work Proof of stake Proof of authority Proof of people None 1 out of 7 Time is Up!
