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

Question 1

Which of the following best describes the principle of decentralization in blockchain technology?

Accepted Answer

Control and decision-making are distributed across a peer-to-peer network of participants.

Answer

Decentralization is a core concept of blockchain, meaning there is no central authority. Instead, control and data are distributed among the network's participants (nodes), who collectively validate transactions and maintain the ledger. This removes single points of failure and makes the network resistant to censorship and manipulation.

Question 2

A development team is building a decentralized application for supply chain management. They need a mechanism to ensure that all participants agree on the validity and order of transactions without a central intermediary. Which blockchain component fulfills this requirement?

Accepted Answer

Consensus Mechanism

Answer

A consensus mechanism is the protocol that allows nodes in a distributed network to agree on the state of the ledger. It ensures that all valid transactions are recorded and that all participants have an identical copy of the ledger, which is crucial for a trustless environment like a supply chain application.

Question 3

What is the primary function of a cryptographic hash in linking blocks together to form a blockchain?

Accepted Answer

To generate a unique, fixed-length 'fingerprint' of the previous block's header, creating a secure and immutable chain.

Answer

Each block in a blockchain contains the cryptographic hash of the previous block's header. This hash acts as a unique identifier or 'fingerprint'. Because each block references the hash of the one before it, a secure and tamper-evident chain is created. Any change to a previous block would alter its hash, which would break the link to all subsequent blocks.

Question 4

In the context of blockchain, what is the relationship between a user's private key and public key?

Accepted Answer

The public key is mathematically derived from the private key and can be shared freely.

Answer

In public-key cryptography, a private key is generated first. A one-way mathematical function is then used to derive a corresponding public key from the private key. The private key must be kept secret as it is used to sign transactions and prove ownership, while the public key can be shared with others to receive funds.

Question 5

An organization wants to automate the payment of an insurance policy. The policy should automatically pay out a claim to a farmer if a trusted external weather data source reports a drought. Which blockchain concept would be most suitable for implementing this?

Accepted Answer

Smart Contract

Answer

A smart contract is a self-executing contract with the terms of the agreement directly written into code. It can automate actions based on predefined conditions. In this scenario, a smart contract could be programmed to execute a payment (the action) when it receives data from a trusted source (an oracle) indicating a drought has occurred (the condition).

CBCP - Certified Blockchain Professional Practice Test

CBCP - Certified Blockchain Professional Practice Test

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