Blockchain CBBF Exam
Certified Blockchain Business Foundations (Page 4 )

Updated On: 30-Jan-2026

How are blocks chained together?

  1. By sharing the same transaction details
  2. Information of the previous block is embedded into the current block through hashing
  3. Information of the current block is embedded into the genesis block
  4. With a physical chain

Answer(s): B



What does immutable mean?

  1. Fault tolerant
  2. Unable to be changed
  3. Highly secure
  4. None of the above

Answer(s): B



In which consensus algorithm is a nonce used?

  1. Proof of Activity
  2. Proof of Work
  3. Proof of Stake
  4. Proof of Burn
  5. All of the above

Answer(s): B


Reference:

https://www.mycryptopedia.com/bitcoin-nonce-explained/



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

  1. True
  2. False

Answer(s): A



The Blockchain ledger is commonly referred to as _____________.

  1. a database ledger
  2. a triple-entry ledger
  3. a double-entry ledger
  4. a genesis block

Answer(s): A



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