CBE Blockchain Use Cases & Applications 5

Question 1

What is a Decentralized Autonomous Organization (DAO)?

Accepted Answer

An organization governed by smart contracts and token-holder voting

Answer

DAOs encode governance rules in smart contracts, letting members propose and vote on decisions.

Question 2

Why are Layer 2 solutions such as the Lightning Network important for micropayment use cases?

Accepted Answer

They allow fast, low-cost transactions off the main chain with periodic settlement

Answer

Payment channels let parties transact many times off-chain and settle the net result on the base layer, cutting fees.

Question 3

In a blockchain-based carbon credit marketplace, what key problem is addressed?

Accepted Answer

Double counting and lack of transparency in credit issuance and retirement

Answer

On-chain registries make it visible when a credit is issued, transferred, and retired, reducing double counting.

Question 4

A shipping company replaces paper bills of lading with blockchain-based electronic records. What is the main benefit?

Accepted Answer

Faster, secure transfer of title documents and reduced fraud

Answer

Digital bills of lading can be transferred instantly with an auditable history, avoiding courier delays and forgery.

Question 5

What is the primary purpose of a zero-knowledge proof in enterprise blockchain applications?

Accepted Answer

To prove a statement is true without revealing the underlying data

Answer

ZKPs let a party prove facts such as sufficient funds or compliance without exposing confidential details.

CBE - Certified Blockchain Expert Practice Test