Blockchain Types of Blockchain Networks Questions and Answers

Question 1

Which of the following is a defining characteristic of a public, permissionless blockchain?

Accepted Answer

Anyone can join the network, read the ledger, and participate in the consensus process.

Answer

Public, permissionless blockchains like Bitcoin and Ethereum are designed to be open and accessible to everyone. Anyone can download the software, connect to the network, view the entire transaction history, and participate in validating transactions (consensus) without needing approval from a central administrator.

Question 2

A global shipping consortium formed by ten major logistics companies wants to create a shared, immutable ledger. They need to restrict network participation and validation to only member companies to protect sensitive commercial data. Which type of blockchain network is most appropriate?

Accepted Answer

Consortium Blockchain

Answer

A consortium blockchain is governed by a group of organizations rather than a single entity (private) or being open to the public. This model is ideal for collaboration between multiple companies in the same industry, allowing them to share a ledger with controlled access, ensuring data privacy and joint governance among trusted parties.

Question 3

What is a primary advantage of a private blockchain when compared to a public blockchain?

Accepted Answer

Greater transaction speed and scalability.

Answer

Private blockchains have a limited number of known, permissioned nodes. This allows for more efficient consensus mechanisms and significantly higher transaction throughput (speed) and scalability compared to public blockchains, which must secure a vast, anonymous network.

Question 4

A hospital wants to use a blockchain to store patient medical records. They need to keep sensitive patient data confidential and on a permissioned ledger, but also provide a way for patients to publicly verify the integrity and timestamp of their records without revealing the content. Which network model best addresses this need for both privacy and public verifiability?

Accepted Answer

Hybrid Blockchain

Answer

A hybrid blockchain combines features of both private and public networks. In this scenario, the confidential medical records can be stored on a private, permissioned chain accessible only to the hospital and patient, while a hash or proof of the record can be anchored to a public blockchain for immutable, publicly verifiable timestamping and integrity checks.

Question 5

In the context of blockchain network types, what is the key difference between a private blockchain and a consortium blockchain?

Accepted Answer

A private blockchain is controlled by a single organization, while a consortium is governed by multiple organizations.

Answer

The primary distinguishing factor is governance. A private blockchain is managed and controlled by a single entity. A consortium blockchain distributes control among a group of pre-selected, collaborating organizations.

Blockchain Practice Test

Blockchain Practice Test

Blockchain Types of Blockchain Networks Questions and Answers