Blockchain CBBF Exam
Certified Blockchain Business Foundations (Page 2 )

Updated On: 30-Jan-2026

What does a Merkle tree provide?

  1. Efficient block lookups and protection against forgery
  2. Anonymity and transparency
  3. A Turing complete distributed network
  4. A way to deploy smart contracts onto the Blockchain
  5. All of the above

Answer(s): A



How does Blockchain use hashing? Select all that apply.

  1. To condense information making it easy to compare large amounts of data.
  2. To chain together blocks
  3. To provide anonymity with public key cryptography
  4. To select which node to use
  5. All of the above

Answer(s): B,D



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

  1. By paying miners with U.S. dollars
  2. By paying the miners with cryptocurrency
  3. By placing their name on the Blockchain
  4. By not charging users monthly subscription costs

Answer(s): B


Reference:

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



How would a developer make a change to Blockchain protocol?

  1. There are no restrictions, a developer could just change the code
  2. A developer would need to initiate a hard fork
  3. There is no way to change Blockchain protocol
  4. change the orderer configuration
  5. None of the above

Answer(s): C



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

  1. financial transactions
  2. manufacturing supply chain
  3. medical records
  4. food traceability
  5. All of the above

Answer(s): E



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