blockchain cbbf practice test

Certified Blockchain Business Foundations

Last exam update: Nov 18 ,2025
Page 1 out of 6. Viewing questions 1-15 out of 84

Question 1

What does a Merkle tree provide?

  • A. Efficient block lookups and protection against forgery
  • B. Anonymity and transparency
  • C. A Turing complete distributed network
  • D. A way to deploy smart contracts onto the Blockchain
  • E. All of the above
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Answer:

A

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Question 2

What does P2P stand for?

  • A. Person to Person
  • B. Public to Person
  • C. Peer to Peer
  • D. Product to Person
  • E. None of the above
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Answer:

C

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Question 3

Blockchain is always decentralized.

  • A. True
  • B. False
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Answer:

A

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Question 4

What is Ethereum?

  • A. Another name for Bitcoin
  • B. A platform for creating decentralized applications
  • C. A currency
  • D. Another name for Blockchain
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Answer:

B

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Question 5

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
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Answer:

D

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Question 6

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
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A

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Question 7

Blockchain is always a better alternative to a standard database.

  • A. True
  • B. False
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Answer:

B

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Question 8

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
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Answer:

D

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Question 9

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
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A

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Question 10

A distributed network is always decentralized.

  • A. True
  • B. False
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Answer:

B

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Question 11

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
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Answer:

B

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Question 12

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
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Answer:

D

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Question 13

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
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Answer:

E

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Question 14

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
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Answer:

E

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Question 15

Which item(s) make up a block header?

  • A. The hash of the Merkle root and the header of the previous block
  • B. The hash of every transaction in a specific block and the next block
  • C. The time stamp of the block and the genesis block hash
  • D. The hash of the previous block
Mark Question:
Answer:

D

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