Blockchain Blockchain Solution Architect CBSA Questions & Answers

• Question 31:

  In common blockchain design, blockchain addresses or "accounts" are generated by:

  A. A PRNG output guaranteed to be unique

  B. A server/node timestamp added to a PRNG output

  C. Creating a hash based on a cryptographic public key and various meta data

  D. The most recent block height hash combined with a cryptographic private key

  Correct Answer: C

• Question 32:

  Which types of data are able to be stored on any given blockchain ledger?

  A. Each blockchain software specifies its own data storage rules

  B. Any data that is within the UTC-8 standard

  C. Unencrypted textual and numerical data

  D. Encrypted textual and numerical data

  Correct Answer: D

• Question 33:

  In Proof of Work group consensus, the "nonce" refers to?

  A. The random data to be combined with the block data which will produce a hash output matching the current difficulty level

  B. Random nonsense data inserted at the end of a block to fill it completely

  C. The average Bitcoin price over the last 90 days

  D. None of the above

  Correct Answer: A

  Reference: https://en.bitcoin.it/wiki/Nonce

• Question 34:

  In common blockchain design, identity and transaction approval is possible through:

  A. AES encryption

  B. Public key cryptography

  C. Secret key cryptography

  D. None of the above

  Correct Answer: D

  Reference: https://hackernoon.com/blockchain-technology-explained-introduction-meaning-andapplications-edbd6759a2b2

• Question 35:

  A product's supply chain data is stored on blockchain. Only members of the product supply chain can write

  announcements to the blockchain but any consumer can query this data in a store to learn more about the

  product they want to buy.

  This is an example of a ____/____ blockchain.

  A. public /closed

  B. private / open

  C. private / closed

  D. public / open

  Correct Answer: B

• Question 36:

  Proof of Stake offers which advantage over Proof of Work?

  A. Greater transaction speed

  B. It is compatible with new generation chipsets

  C. It has a longer history and deeper knowledge base

  D. None of the above

  Correct Answer: D

• Question 37:

  Ownership or partial ownership of an asset can be tracked with which type of token?

  A. Equity

  B. Utility

  C. Ethereum

  D. Game-based

  Correct Answer: B

• Question 38:

  Transactions can be only added to a blockchain.

  A. FALSE

  B. TRUE

  Correct Answer: A

• Question 39:

  Which one of the following is a consideration that must be taken into account when using Hyperledger Fabric that you wouldn't need worry about on Ethereum?

  A. The fees for deploying and using Smart Contracts

  B. How you will provide proper uptime for the network

  C. The level of security of Smart Contracts (chaincode)

  D. How often hard forks occurs on the software

  Correct Answer: D

• Question 40:

  Which one of the following is true concerning Hyperledger Fabric?

  A. Cryptocurrency cannot be created or used

  B. because it is permissioned, companies cannot launch products on it

  C. Because it is permissioned, it is impossible to display data to the general public

  D. None of the above

  Correct Answer: C