CBE - Certified Blockchain Expert Types of Blockchain Platforms Questions and Answers — Questions and Answers
Question 1: A global shipping company wants to create a blockchain for internal tracking of its containers. The primary requirements are high transaction throughput, strict access control for its employees only, and confidentiality of shipping manifests. Which type of blockchain platform is most suitable?
- Public Blockchain
- Hybrid Blockchain
- Consortium Blockchain
- Private Blockchain (Correct answer)
Correct answer: Private Blockchain
A private blockchain is ideal because it is controlled by a single entity, allowing for maximum control over permissions, privacy, and performance. Since all participants are known and trusted, consensus can be achieved much faster, leading to high throughput. Public access is not required, and governance is not shared among multiple companies.
Question 2: What is the primary characteristic that distinguishes a consortium blockchain from a private blockchain?
- Governance is shared among multiple organizations. (Correct answer)
- It is the only type that can execute smart contracts.
- Transaction speeds are significantly slower.
- It is completely open for anyone to join and validate.
Correct answer: Governance is shared among multiple organizations.
The defining difference is governance. A private blockchain is controlled and operated by a single organization. A consortium blockchain is governed by a pre-selected group of organizations that share control and decision-making, making it semi-decentralized.
Question 3: Which of the following is a primary advantage of using a public, permissionless blockchain for an application requiring high levels of censorship resistance and transparency?
- Low and predictable transaction fees.
- Centralized control over participant access.
- Anyone can join and validate transactions without approval. (Correct answer)
- Data is encrypted and visible only to specific parties.
Correct answer: Anyone can join and validate transactions without approval.
The permissionless and decentralized nature of public blockchains means no central authority can block users or transactions. This open participation is the foundation of its censorship resistance and transparency, as the ledger is publicly auditable by anyone.
Question 4: A government agency is developing a system for issuing digital academic credentials. They want to store sensitive student details on a permissioned network but anchor cryptographic proofs of these credentials onto a public blockchain. This allows anyone to verify the credentials' authenticity without accessing private data. This architecture describes which type of platform?
- Public Blockchain
- Hybrid Blockchain (Correct answer)
- Private Blockchain
- Consortium Blockchain
Correct answer: Hybrid Blockchain
A hybrid blockchain combines features of both private and public chains. In this scenario, the private portion handles confidential data and access control, while the public portion provides an immutable, publicly verifiable proof of the data's integrity, which is a classic use case for this model.
Question 5: In the context of blockchain platforms, the term 'permissionless' primarily implies that:
- anyone can join the network, participate in consensus, and view the ledger without needing approval. (Correct answer)
- all transactions are anonymous and cannot be traced.
- the network is controlled by a single entity that grants permissions.
- developers do not need permission from a central body to build applications on the platform.
Correct answer: anyone can join the network, participate in consensus, and view the ledger without needing approval.
'Permissionless' directly refers to the lack of a gatekeeper for participating in the network's core functions. On a public, permissionless blockchain, any individual can connect a node, view the public ledger, submit transactions, and attempt to participate in the consensus mechanism without seeking approval from a central authority.
Question 6: An enterprise choosing to implement a private blockchain instead of a public one gains enhanced performance and data confidentiality at the expense of which key blockchain principle?
- Scalability
- Decentralization (Correct answer)
- Interoperability
- Usability
Correct answer: Decentralization
Private blockchains are controlled by a single entity, making them centralized. This centralization allows for higher performance and privacy controls but sacrifices the core benefit of decentralization, which provides the trustlessness and censorship resistance found in public networks.
CBE - Certified Blockchain Expert Types of Blockchain Platforms Questions and Answers
A global shipping company wants to create a blockchain for internal tracking of its containers.
The primary requirements are high transaction throughput, strict access control for its employees only, and confidentiality of shipping manifests.
Which type of blockchain platform is most suitable?