Q1) Bitcoin is a _____ blockchain network.
- a) Public
- b) Private
- c) Consortium
- d) Permissioned
Q2) What is the maximum number of Bitcoins that can be created?
- a) 51 Million
- b) 16 Million
- c) 21 Million
- d) 20 Million
Q3) There is reward for those mining Stale blocks.(True/False)
- a) True
- b) False
Q4) According to blockchain transaction flow, when a node in a blockchain network receives a transaction it first _____.
- a) Creates a block
- b) Solves the puzzle
- c) Verifies the transaction
- d) Broadcasts the transaction
Q5) Hyperledger Grid is a framework which provides a platform for ________.
- a) Identity Management
- b) Supply chain solutions
- c) Payment solutions
- d) Asset management
Q6) _____ manages the identity and the permissioned access for the clients and peers in Hyperledger Fabric Network.
- a) Orderer
- b) Committing Peer
- c) Endorsing Peer
- d) MSP
Q7) In PoW, the concept of _________ is introduced, in order to adjust the puzzle-solving time.
- a) Consensus
- b) Merkle Tree
- c) Difficulty
- d) Previous Hash
Q8) Which of the following statement is true?
- a) In a private blockchain network, anyone can join the network
- b) Blockchain is not a peer to peer network
- c) Randomization in PoS prevents centralization
- d) It is possible to trace back the private key from the given public key
Q9) Smart contract in Ethereum refers to _____.
- a) Self executing program that resides in EVM
- b) Consensus used in Ethereum network
- c) Data model used in Ethereum network
- d) Cryptocurrency
Q10) A Sawtooth-Ethereum integration project which allows the interoperability of the Sawtooth platform to Ethereum.GethSeth
- a) Geth
- b) Seth
- c) EOS
- d) Besu
Q11) _____ is a shared cryptographic library that can be used for implementing cryptographic functionalities in projects.
- a) Hyperledger Explorer
- b) Hyperledger Cello
- c) Hyperledger Quilt
- d) Hyperledger Ursa
Q12) In Hyperledger Sawtooth, business logic is written in _____ .
- a) Chaincode
- b) Transaction Processor
- c) Smart Contract
- d) Validator
Q13) Which of the following step is not involved in the consensus mechanism of Hyperledger Fabric?
- a) Transaction endorsement
- b) Ordering
- c) Mining
- d) Validation and commitment
Q14) What is the name of the research paper that brought Bitcoin to the world?
- a) Bitcoin: a peer to peer digital cash system
- b) Bitcoin: a decentralised electronic cash system
- c) Bitcoin: a peer to peer digital money system
- d) Bitcoin: a peer to peer electronic cash system
Q15) Private communication in Hyperledger Fabric is possible because of channels. Is the statement true or false ?
- a) True
- b) False
Q16) Digital Signature is used for ?
- a) Signing the transaction.
- b) Block creation.
- c) Ordering blocks.
- d) None of the above.
Q17) Is Blockchain fully public?
- a) Yes
- b) No
- c) Depends on the Blockchain Network
- d) Depends on the Cryptography
Q18) What is fork in the Blockchain Network ?
- a) A new branch is created within the chain
- b) Output of mining
- c) Hash value of a block
- d) A lightweight node
Q19) Solidity is _____.
- a) Programming language for writing smart contracts in Ethereum.
- b) Programming language for writing smart contracts in Hyperledger Fabric.
- c) A framework for coding smart contracts.
- d) All of the above.
Q20) What is a node in a blockchain?
- a) Cryptocurrency
- b) A computer on a Blockchain network
- c) Hash value
- d) Mining puzzle
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