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Free CBDH Exam Braindumps (page: 8)

Page 7 of 49
PDF with 195 Questions

What type of peer executes chaincode?

  1. Anchor peer
  2. Endorsing Peer
  3. Chaincode is executed by the client
  4. Ordered Peer
  5. Chaincode is not executed by a peer.

Answer(s): B

Explanation:

Endorsing Peer Endorser peer Peers can be marked as Endorser peer (i.e. Endorsing peer). Upon receiving the "transaction invocation request" from the Client application the Endorser peer Validates the transaction. Check certificate details and roles of the requester. Executes the Chaincode (Smart Contract) and simulates the outcome of the transaction. But it does not update the ledger. At the end of the above two tasks the Endorser may approve to disapprove the transaction. As only the Endorser node executes the Chaincode (Smart Contract) so there is no necessity to install Chaincode in each and every node of the network which increases the scalability of the network.



What type of certificates act as secure identifiers, digital passports which contain information about the owner in Hyperledger Fabric certificate management?

  1. RSA
  2. PEM
  3. PKI
  4. X509

Answer(s): D

Explanation:

X509 certificates are used in Hyperledger Fabric. An X.509 certificate is any certificate under the X.509 specification standard for public key infrastructure and Privilege Management Infrastructure (PMI). The X.509 provides standardized formats for: Attribute certificates Public key certificates Certificate revocation lists Certification validation algorithms



Consensus on the Blockchain defines________________

  1. The distribution of each data block
  2. Agreement of a valid transaction by all the network nodes
  3. Security between two blocks of data
  4. Basic security of the blockchain

Answer(s): B

Explanation:

Consensus is when the distributed ledger has been updated and all nodes maintain their own identical copy of the ledger which essentially is an agreement. This is also known as the "World State" in some blockchains. This architecture allows for a new capacity as a system of recordkeeping
that goes beyond being a simple database.



Which of the following is the BEST definition of Decentralization?

  1. Peer-to-Peer data sharing, hosting hardware owned by many not few, fault tolerant, secure, lower performance
  2. Distributed data sharing, hosting hardware owned by many not few, fault tolerant, secure, lower performance
  3. Peer-to-Peer data sharing, hosting hardware owned by a few not many, fault tolerant, secure, lower performance

Answer(s): A

Explanation:

Peer-to-Peer essentially uses data sharing, hosting hardware owned by many not few, fault tolerant, secure, lower performance. It's common way to share files--a good example was Napster. Peer-to- peer (P2P) file sharing is the distribution of digital media such as software, videos, music, and images through an informal network in order to upload and download files. Typically, P2P software enables users to select which files to share. These files are indexed on a central server, making them available for other users to find and download.






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