FREE Certified Blockchain Professional (CBCP) Blockchain Core Concepts Questions and Answers

Question 1

Which of the following is the PRIMARY role of a consensus mechanism in a decentralized blockchain network?

Accepted Answer

To enable all network participants to agree on the validity and order of transactions, ensuring a single, consistent version of the ledger.

Answer

To encrypt transaction data, ensuring confidentiality from external observers.

Answer

To execute the business logic of smart contracts when predefined conditions are met.

Answer

To generate new cryptographic keys for users to secure their digital assets.

Question 2

A supply chain consortium wants to implement a blockchain solution to track goods from manufacturer to retailer. They require that only pre-approved and vetted participants can join the network and view transaction details. Which type of blockchain architecture would be most suitable for this scenario?

Accepted Answer

Private Blockchain

Answer

Public Blockchain

Answer

Hybrid Blockchain

Answer

Sidechain

Question 3

What is the key characteristic of a cryptographic hash function that ensures the immutability of a blockchain?

Accepted Answer

The avalanche effect, where a minor change in the input data results in a completely different hash output.

Answer

Its ability to reverse the hash to retrieve the original data.

Answer

The generation of a variable-length output based on the input size.

Answer

The use of symmetric keys for both hashing and verification.

Question 4

In the context of blockchain, what is a smart contract?

Accepted Answer

A self-executing program stored on the blockchain that automatically runs when predetermined conditions are met.

Answer

A legally binding agreement that is drafted and stored on a decentralized network.

Answer

A physical contract that has been digitized and stored in a block's metadata.

Answer

A network protocol for managing peer-to-peer connections and data synchronization.

Question 5

Which core blockchain concept ensures that all participants have an identical copy of the transaction history, providing transparency and resilience?

Accepted Answer

Distributed Ledger

Answer

Decentralization

Answer

Cryptography

Answer

Tokenization

Question 6

An organization is concerned about the high energy consumption and computational resource requirements of the Proof of Work (PoW) consensus mechanism. Which of the following consensus mechanisms was designed to be a more energy-efficient alternative?

Accepted Answer

Proof of Stake (PoS)

Answer

Proof of Authority (PoA)

Answer

Proof of Burn (PoB)

Answer

Proof of Capacity (PoC)