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Free CBSA Exam Braindumps (page: 22)

Page 21 of 58
PDF with 229 Questions

Which of the following blockchain key components state how the transactions will be confirmed?

  1. Distributed Ledger database
  2. Validity Rules
  3. Consensus Algorithm
  4. Encryption

Answer(s): B

Explanation:

Validity rules (validation) state how the user and the transactions will be validated. This is predetermined by the consensus algorithm.



A chaincode package that was signed at creation can be handed over to other owners for inspection and signing in Hyperledger.

Is it true that the workflow supports out-of-band signing of chaincode package?

  1. TRUE
  2. FALSE

Answer(s): A

Explanation:

A chaincode package that was signed at creation can be handed over to other owners for inspection and signing. The workflow supports out-of-band signing of chaincode package.


Reference:

http://hyperledger-fabric.readthedocs.io/en/release-1.1/chaincode4noah.html



____________is advantageous because it presents scalability and low cost transactions, but like DPoS introduces a component of centralization.

What algorithm is being referenced here?

  1. Byzantine Fault Tolerance
  2. Hashgraph
  3. Proof of Stake
  4. Proof of Work
  5. DAG

Answer(s): A

Explanation:

BFT is notably implemented by Ripple (where validators are pre-selected by the Ripple foundation) and Stellar (where anyone can be a validator and trust is established by the community). BFT is advantageous because it presents scalability and low cost transactions, but like DPoS introduces a component of centralization.


Reference:

https://hackernoon.com/an-overview-of-cryptocurrency-consensus-algorithms-9d744289378f



In Hashcash, miners all compete to look for a so called. " ____________"which, if provided as input (together with other parts of a block header) to a hash function, yields an output that’s numerically small enough to claim the next block reward.

  1. Difficulty bits
  2. Nonce
  3. Merkle Root
  4. Timestamp

Answer(s): B






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