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Free CBDH Exam Braindumps (page: 20)

Page 19 of 49
PDF with 195 Questions

Which Hyperledger tool provides an open source browser for viewing activity on the underlying blockchain network?

  1. Caliper
  2. Quilt
  3. Cello
  4. Explorer

Answer(s): D

Explanation:

Explorer can view, invoke, deploy or query blocks, transactions and associated data, network information, chain codes and transaction families, as well as other relevant information stored in the ledger. Powerful, easy-to-use, highly maintainable, open source browser for viewing activity on the underlying blockchain network.



In Hyperledger Fabric there is three types of chaincode. (Select three.)

  1. Private
  2. Hybrid
  3. Access Controlled
  4. Consortium
  5. Public
  6. Compliant

Answer(s): A,C,E



When reviewing chaincode you see a function called "ChaincodeStubInterface" in the program.
What does this function do?

  1. It is used to access the ledger.
  2. It is used to access the chaincode interface.
  3. It is used to access the ledger and modify the ledger.
  4. It is used to stop the chaincode interface.

Answer(s): C



There are two popular approaches to defining assets in most blockchain solutions. (Select two.)

  1. Stateless UTXO model, where account balances are encoded into past transaction records.
  2. Account model, where account balances are kept in state storage space in memory registers.
  3. Stateful UTXO model, where account balances are encoded into past transaction records.
  4. Account model, where account balances are kept in stateless storage space on the ledger.
  5. Stateless UTXO model, where account balances are encoded into current transaction records.
  6. Account model, where account balances are kept in state storage space on the ledger.

Answer(s): A,F

Explanation:

Users can use chaincode (for business rules) and membership service (for digital tokens) to design assets, as well as the logic that manages them. There are two popular approaches to defining assets in most blockchain solutions: the stateless UTXO model, where account balances are encoded into past transaction records; and the account model, where account balances are kept in state storage space on the ledger. Each approach carries its own benefits and drawbacks. This blockchain fabric does not advocate either one over the other. Instead, one of our first requirements was to ensure that both approaches can be easily implemented with tools available in the fabric.






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