Q.1 Blockchain provides ___________ kind of database for every transaction involving value.
A. Closed Decentralized
B. Open Decentralized
C. Closed Centralized
D. Open Centralized
Ans : Open Decentralized
Q.2 The three concepts used to explain the foundation of blockchain are __________________.
A. Digital Ledger, Physical Assets, Banks
B. Distributed Network, Cryptography , Public Ledger
C. Ledger, Bitcoins, Digital Identity
D. Business Network, Ledger, Physical Assets
Ans : Distributed Network, Cryptography , Public Ledger
Q.3 Consortium blockchain has a predefined set of nodes allowing the users to write the data.
A. True
B. False
Ans : True
Q.4 Private blockchain is a de-centralized type of blockchain?
A. True
B. False
Ans : False
Q.5 Hash is used to ensure integrity of the data transmitted in the blockchain network.
A. True
B. False
Ans : True
Q.6 Cryptocurrency is authorized in all countries.
A. True
B. False
Ans : False
Q.7 Encryption reduces data security?
A. True
B. False
Ans : False
Q.8 In bitcoin mining, the computational power adjusts the difficulty level of mining.
A. True
B. False
Ans : True
Q.9 The sender and the receiver in a transaction always provide miners with a fee.
A. True
B. False
Ans : False
Q.10 The two types of cryptography are ______________.
A. Asymmetric and Symmetric
B. Asymmetric and Public
C. Public and Private
D. Symmetric and Public
Ans : Asymmetric and Symmetric
Q.11 The output of hashing is popularly known as _______.
A. Digital Signature
B. Plain text
C. Contract
D. Digest
Ans : Digest
Q.12 Which among the following are the advantages of using Bitcoin?
A. Negligible transaction fee
B. Your account cannot be frozen
C. Can be used to transfer money anywhere in the world
D. All the options
Ans : All the options
Q.13 Which platform could gain its best use case from supply chain industry?
A. R3 Corda
B. Ethereum
C. Hyperledger
D. All the options
Ans : Hyperledger
Q.14 Which of the following platform(s) provides a modular architecture?
A. Hyperledger
B. Ethereum
C. Ethereum and R3 Corda
D. R3 Corda
Ans : Hyperledger
Q.15 The first smart contract platform is _______.
A. R3 Corda
B. Hyperledger Fabric
C. Blockchain
D. Ethereum
Ans : Ethereum
Q.16 Where can you buy a cryptocurrency?
A. In a smart contract
B. Cryptocurrency Exchanges
C. Through a private transaction
D. All the options
Ans : Cryptocurrency Exchanges
Q.17 Ethereum is a digital currency.
A. True
B. False
Ans : False
Q.18 Crypto analysis is used ___________.
A. to encrypt the data
B. to find some insecurity in a cryptographic scheme
C. to increase the speed
D. None of the options
Ans : to find some insecurity in a cryptographic scheme
Q.19 Which among the following option/options is/are consensus algorithms?
A. PoS
B. Byzantine
C. PoW
D. All of the options
Ans : All of the options
Q.20 New bitcoins are released every time a transaction is verified.
A. True
B. False
Ans : True
Q.21 Ether provides greater flexibility than bitcoin.
A. True
B. False
Ans : True
Q.22 Which among the following is the most flexible cryptocurrency?
A. Ripple
B. Bitcoin
C. Ether
D. Litecoin
Ans : Ether
Q.23 Which platform could gain its best use case from financial service industry?
A. Hyperledger
B. R3 Corda
C. Ethereum
D. All the options
Ans : All the options
Q.24 ________ is checked for your previous transactions to determine your wallet balance.
A. Bitcoin Network and your Wallet
B. Ledger
C. Miners and Users
Ans : Ledger
Q.25 Bitcoin network would make it impossible to bypass the traditional financial intermediaries.
A. True
B. False
Ans : False
Q.26 Cyptocurrency is the only use case of blockchain.
A. True
B. False
Ans : False
Q.27 The value of coins, such as litecoin and bitcoin, remains the same across all the exchanges that actively trade them.
A. True
B. False
Ans : False
Q.28 Hash can be used to validate the input.
A. True
B. False
Ans : True
Q.29 Hyperledger allows us to customize the visibility of a transaction in a blockchain.
A. True
B. False
Ans : True
Q.30 _______ records all the transactions in a blockchain.
A. Contact
B. Block
C. Intermediaries
Ans : Block
Q.31 Who is the founder of Hyperledger fabric?
A. Linux Foundation
B. Ethereum Developers
C. Miners in blockchain
D. R3
Ans : Linux Foundation
Q.32 In asymmetric key cryptography, the public key is available with ________.
A. sender
B. receiver
C. sender and receiver
D. everyone in the network
Ans : everyone in the network
