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

The fundamental purpose of a consensus mechanism is to ensure that all nodes in a distributed network agree on the current state of the ledger. This prevents issues like double-spending and ensures the integrity and consistency of the blockchain without a central authority.

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

A private blockchain is the most appropriate choice because it is a permissioned network. Access is restricted to authorized participants, which aligns with the consortium's need for control over who can join and view sensitive supply chain data.

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

The avalanche effect is crucial for immutability. Each block in a blockchain contains the hash of the previous block. If any data in a previous block is altered, its hash will change completely. This change would cascade through all subsequent blocks, making any tampering immediately evident to the entire network.

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 smart contract is essentially a piece of code that lives on the blockchain. It is programmed to execute specific actions automatically based on 'if-then' logic once its predefined conditions have been fulfilled, removing the need for intermediaries.

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

A distributed ledger is a database that is consensually shared and synchronized across multiple sites, institutions, or geographies. In blockchain, this means every node in the network maintains a copy of the ledger, ensuring redundancy and transparency, as all participants see the same version of the truth.

CBCP - Certified Blockchain Professional Practice Test

CBCP - Certified Blockchain Professional Practice Test

CBCP Blockchain Core Concepts Questions and Answers