Blockchain Blockchain Other Certification CBBF Questions & Answers

• Question 21:

  Which type of data can be stored on a Blockchain?

  A. A financial transaction

  B. A vote cast in an election

  C. A personal medical record

  D. Romeo and Juliet: The entire play

  E. All of the above

  Correct Answer: E

• Question 22:

  The cryptocurrency Bitcoin is__________.

  A. another application that runs on a Blockchain

  B. the same as all other cryptocurrencies

  C. replacing bartering in many parts of the world

  D. a replacement currency for the U.S. dollar

  Correct Answer: A

• Question 23:

  Blockchain does not provide?

  A. Security

  B. Immutability

  C. Fault tolerance

  D. Fact Transaction time

  Correct Answer: D

• Question 24:

  How does Blockchain use hashing? Select all that apply.

  A. To condense information making it easy to compare large amounts of data.

  B. To chain together blocks

  C. To provide anonymity with public key cryptography

  D. To select which node to use

  E. All of the above

  Correct Answer: BD

• Question 25:

  How do consensus algorithms like Proof of Work or Proof of Stake incentivize miners to participate?

  A. By paying miners with U.S. dollars

  B. By paying the miners with cryptocurrency

  C. By placing their name on the Blockchain

  D. By not charging users monthly subscription costs

  Correct Answer: B

  Reference: https://www.oliverisaacs.com/proof-of-work-or-proof-of-stake-whats-the-future-of-crypto/

• Question 26:

  How would a developer make a change to Blockchain protocol?

  A. There are no restrictions, a developer could just change the code

  B. A developer would need to initiate a hard fork

  C. There is no way to change Blockchain protocol

  D. change the orderer configuration

  E. None of the above

  Correct Answer: C

• Question 27:

  Which of these applications would be suited for a private Blockchain?

  A. financial transactions

  B. manufacturing supply chain

  C. medical records

  D. food traceability

  E. All of the above

  Correct Answer: E

• Question 28:

  How are blocks chained together?

  A. By sharing the same transaction details

  B. Information of the previous block is embedded into the current block through hashing

  C. Information of the current block is embedded into the genesis block

  D. With a physical chain

  Correct Answer: B

• Question 29:

  What does immutable mean?

  A. Fault tolerant

  B. Unable to be changed

  C. Highly secure

  D. None of the above

  Correct Answer: B

• Question 30:

  Blockchain has more built-in security than a standard database.

  A. True

  B. False

  Correct Answer: A