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Free CBDH Exam Braindumps (page: 5)

Page 4 of 49
PDF with 195 Questions

Blockchain solutions are comprised of four building blocks. Which of the following answers list the building blocks?

  1. Shared ledger, Privacy, Trust, and Smart Contracts or (Chaincode)
  2. Shared ledger, Centralization, Trustless, and Smart Contracts or (Chaincode)
  3. Shared ledger, Privacy, Trustless, and Smart Contracts or (Chaincode)
  4. Shared ledger, Centralization, Trust, and Smart Contacts or (Chaincode)

Answer(s): A



An_____________ is defined as a communication node that is responsible for the distribution of blockchain transactions in Hyperledger Fabric.

  1. MSP
  2. Peer Node
  3. Client Node
  4. Endorsing Node
  5. Orderer

Answer(s): E

Explanation:

Orderer Ordering services handles the main function of the Hyperledger Fabric to maintain consistency in the transactions processes. Ordering services provides a shared communication to clients and peers and helps in broadcasting the messages containing transactions.



The ledger system in Hyperledger Fabric uses what database by default?

  1. CouchDB
  2. LevelDB
  3. MySQL
  4. MS SQL
  5. PostGres SQL

Answer(s): B

Explanation:

The ledger system in Hyperledger fabric uses levelDB. By definition, LevelDB allows concurrent writers to safely insert data into the database by providing internal synchronization. LevelDB uses very coarse-grained synchronization which forces all writes to proceed in an ordered, first-come-first- served basis, effectively reduces throughput to a single thread. State database options include LevelDB and CouchDB. LevelDB is the default key-value state database embedded in the peer process. CouchDB is an optional alternative external state database. Like the LevelDB key-value store, CouchDB can store any binary data that is modeled in chaincode (CouchDB attachment functionality is used internally for non-JSON binary data). But as a JSON document store, CouchDB additionally enables rich query against the chaincode data, when chaincode values (e.g. assets) are modeled as JSON data



Which of the following is a role in Fabric that has permission to create transactions and query network data?

  1. Chain Transactor
  2. Chain Administrator
  3. Chain Auditor
  4. Chain Member

Answer(s): A






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