Blockchain Technology Types of Blockchain Networks 5

Question 1

Which blockchain network type is most vulnerable to a 51% attack?

Accepted Answer

Small public proof-of-work blockchain with low hash rate

Answer

Small public PoW blockchains with low hash rates are most vulnerable because an attacker can more easily acquire majority hash power.

Question 2

A company wants blockchain data to be auditable by regulators but invisible to competitors. Which approach best achieves this?

Accepted Answer

Hybrid blockchain with selective disclosure

Answer

Hybrid blockchains allow selective disclosure, enabling regulatory auditors to access data while keeping it private from competitors.

Question 3

What is the key difference between Proof of Work used on a public blockchain and Proof of Authority used on a private blockchain?

Accepted Answer

PoA relies on trusted validators while PoW relies on computational competition

Answer

PoA uses pre-approved trusted validators making it efficient for private networks, while PoW uses energy-intensive competition open to anyone.

Question 4

Dragonchain is an example of which blockchain architecture type?

Accepted Answer

Hybrid blockchain combining public and private elements

Answer

Dragonchain uses a hybrid model where business logic runs privately while cryptographic proofs are anchored to public blockchains.

Question 5

Which characteristic makes consortium blockchains particularly attractive for trade finance applications?

Accepted Answer

They enable multiple competing banks to share a trusted ledger without a central intermediary

Answer

Consortium blockchains let competing financial institutions collaborate on a shared ledger while sharing governance and eliminating single-point intermediaries.

Blockchain Practice Test

Blockchain Practice Test

Blockchain Technology Types of Blockchain Networks 5