CBBF : Certified Blockchain Business Foundations Exam

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Certified Blockchain Business Foundations

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Question: 70

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

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

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

3. All of the above

Answer: E

Reference: https://www.forbes.com/sites/jennysplitter/2018/09/30/what-can-blockchain-really-do-for-the-food-industry/

#151984fe488e

Question: 71

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

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

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

3. A private Blockchain is not distributed

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

Answer: D

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

Question: 72

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

1. To limit user access and permissions

2. It is less expensive to develop

3. It requires less mining power than a public Blockchain

4. It requires fewer administrators to manage it

Answer: A

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

Question: 73

A distributed network is always decentralized.

1. True

2. False

Answer: B

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

Question: 74

Transparency allows_____________.

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

2. easy iteration through the Blockchain

3. Records on the Blockchain to never be changed

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

Answer: A

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

Question: 75

Blockchain is always a better alternative to a standard database.

1. True

2. False

Answer: B

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

Question: 76

Blockchain is always decentralized.

1. True

2. False

Answer: A

Question: 77

What is Ethereum?

1. Another name for Bitcoin

2. A platform for creating decentralized applications

3. A currency

4. Another name for Blockchain

Answer: B

Reference: https://blockgeeks.com/guides/ethereum/

Question: 78

Why is Hyperledger a good business solution over other Blockchains?

1. Always permissioned and private

2. It can employ smart contracts

3. Modular design allowing for flexibility in solution

4. Multiple consensus methods can be chosen for use

5. All the above

Answer: D

Question: 79

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: A

Question: 80

What does P2P stand for?

1. Person to Person

2. Public to Person

3. Peer to Peer

4. Product to Person

5. None of the above

Answer: C

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