Blockchain Blockchain Other Certification CBBF Questions & Answers

• Question 71:

  Which of the following are practical use cases for Blockchain?

  A. Voting

  B. A video sharing website

  C. Medical records

  D. Identity management

  E. All of the above

  Correct Answer: E

  Reference: https://www.mycryptopedia.com/16-promising-blockchain-use-cases/

• Question 72:

  What is a hash function?

  A. A one-way function that converts input to a unique string output

  B. A function that stores data behind a key

  C. A two-way function used for condensing information

  D. The block-ID of the block

  E. All the above

  Correct Answer: D

• Question 73:

  Blockchains are being implemented in the food supply chain because_____________.

  A. consumers demand to know where their food comes from

  B. it allows farm to table accountability for safety

  C. they have the potential to provide fast, specific supplier data

  D. it prevents food waste if a food contamination problem occurs

  E. All of the above

  Correct Answer: E

  Reference: https://www.forbes.com/sites/jennysplitter/2018/09/30/what-can-blockchain-really-do-for-thefood-industry/#151984fe488e

• Question 74:

  Blockchains work best when they are____________________.

  A. combined with other technologies

  B. used for financial applications

  C. used alone

  D. used as an alternative to a database

  Correct Answer: B

• Question 75:

  A distributed network is always decentralized.

  A. True

  B. False

  Correct Answer: B

  Reference: https://stackoverflow.com/questions/49195562/difference-between-a-distributed-and-adecentralized-network

• Question 76:

  Why is a private Blockchain used instead of a public one?

  A. To limit user access and permissions

  B. It is less expensive to develop

  C. It requires less mining power than a public Blockchain

  D. It requires fewer administrators to manage it

  Correct Answer: A

  Reference: https://medium.com/coinmonks/public-vs-private-blockchain-in-a-nutshell-c9fe284fa39f

• Question 77:

  How does a private Blockchain differ from a public one? Select all that apply.

  A. A private Blockchain does not use proof of work consensus

  B. A private Blockchain is more efficient and has faster transaction times

  C. A private Blockchain is not distributed

  D. A private Blockchain often requires the identity of users to be known

  Correct Answer: D

  Reference: https://medium.com/coinmonks/public-vs-private-blockchain-in-a-nutshell-c9fe284fa39f

• Question 78:

  Blockchain is always a better alternative to a standard database.

  A. True

  B. False

  Correct Answer: B

  Reference: https://www.coindesk.com/information/what-is-the-difference-blockchain-and-database

• Question 79:

  Why is Hyperledger a good business solution over other Blockchains?

  A. Always permissioned and private

  B. It can employ smart contracts

  C. Modular design allowing for flexibility in solution

  D. Multiple consensus methods can be chosen for use

  E. All the above

  Correct Answer: D

• Question 80:

  Transparency allows_____________.

  A. a trustless system where users can be certain of a result

  B. easy iteration through the Blockchain

  C. Records on the Blockchain to never be changed

  D. users on the Blockchain to change data on the Blockchain

  Correct Answer: A

  Reference: https://lisk.io/academy/blockchain-basics/benefits-of-blockchain/why-is-blockchain-trustless