Blockchain MCQs Quiz Multiple Choice Questions & Answers

1. A block in the blockchain can never have more than one parent block?

1. True Statement
2. False Statement

2. Asymmetric encryption uses:

1. Public and Private keys
2. Proof of Stake
3. Public keys only
4. Private keys only

3. Bitcoin is based on ............... blockchain?

1. Public Permissioned
2. Permissioned
3. Private
4. Public

4. Blockchain can be stored as which of the following?

1. Both of the above
2. None of the above
3. A flat file
4. A Database

5. Blockchain forks can result in which of the following?

1. Multiple parent blocks
2. Multiple children blocks

6. Each block of a Blockchain consists of which of the following?

1. List of transactions
2. All of the above
3. A hash pointer to the previous block
4. Timestamp

7. Hash identifying each block in the Blockchain is generated using which of the following cryptographic algorithm?

1. SHA128
2. SHA256

8. In blockchain, blocks are linked

1. Not linked with each other
2. Backward to the previous block
3. Forward to next block

9. The primary benefit of immutability is

1. Tamper ProofIncreased Efficiency
2. Scalability
3. Improved Security

10. What are the different types of tokens?

1. Currency
2. All of the above
3. Platform
4. Privacy

11. What does P2P stand for?

1. Product to Product
2. Private Key to Public Key
3. Password to Password
4. Peer to Peer

12. What is a blockchain?

1. An exchange
2. A centralized ledger
3. A distributed ledger on a peer to peer network
4. A type of cryptocurrency

13. What is a miner?

1. A person doing calculations to verify a transaction
2. Computers that validate and process blockchain transactions
3. A type of blockchain
4. An algorithm that predicts the next part of the chain

14. What is a node?

1. A computer on a blockchain network
2. An exchange
3. A type of cryptocurrency
4. A blockchain

15. What is a private key?

1. A key NOT to be given to the public
2. A key that opens a secret door
3. A key on your key chain
4. A key given to the public

16. Where can you buy cryptocurrency?

1. A bitcoin ATM
2. All of the above
3. A private transaction
4. An exchange

17. Where do you store your cryptocurrency?

1. Wallet
2. In your pocket
3. Bank account
4. Floppy Disk

18. Where is the LEAST SAFE place to keep your cryptocurrency?

1. On a hot wallet
2. At your work desk
3. In your pocket
4. On an exchange

19. Which is NOT apart of asymmetric encryption?

1. Passphrase
2. Private Key
3. Mining
4. Public key

20. Which of the following is asymmetric encryption Algorithm?

1. RSA
2. Tripple DEA
3. Blowfish
4. Twofish

21. Which of the following is first distributed blockchain implementation?

1. Bitcoin
2. Ethereum

22. Who created Bitcoin?

1. John Mcafee
2. China
3. Satoshi Nakamoto
4. Samsung