CBCP Blockchain Use Cases and Industry Applications — Questions and Answers
Question 1: Which blockchain property most directly helps supply chain provenance tracking?
- An immutable, shared audit trail of custody events (Correct answer)
- High-speed centralized caching
- Anonymous mining
- Unlimited block size
Correct answer: An immutable, shared audit trail of custody events
A tamper-evident ledger shared among participants lets each handoff be recorded and verified. This allows end-to-end traceability of goods.
Question 2: In healthcare, why is blockchain often proposed for patient record exchange?
- It stores all raw medical images on-chain for free
- It can provide auditable, permissioned access and integrity proofs while keeping sensitive data off-chain (Correct answer)
- It removes the need for any privacy regulation
- It guarantees records are never needed to be updated
Correct answer: It can provide auditable, permissioned access and integrity proofs while keeping sensitive data off-chain
Typical designs store hashes and access permissions on-chain and keep sensitive records in off-chain storage. This gives integrity and an audit trail while helping with privacy compliance.
Question 3: Which concept describes a user-controlled digital identity not dependent on a single central authority?
- Federated login
- Self-sovereign identity (SSI) (Correct answer)
- Single sign-on
- Captcha
Correct answer: Self-sovereign identity (SSI)
Self-sovereign identity lets individuals hold and present verifiable credentials, often anchored by decentralized identifiers (DIDs) on a ledger, without relying on one central provider.
Question 4: Which scenario is generally the BEST fit for a blockchain solution?
- A single company's private internal database with one writer
- Multiple mutually distrusting parties needing a shared, tamper-evident record without a trusted intermediary (Correct answer)
- A static website
- A personal to-do list app
Correct answer: Multiple mutually distrusting parties needing a shared, tamper-evident record without a trusted intermediary
Blockchain adds the most value when several parties share data, trust is limited, and no neutral intermediary exists. For single-writer or fully trusted settings, a conventional database is simpler and cheaper.
Question 5: How can blockchain improve cross-border payments?
- By removing every regulatory requirement
- By reducing intermediaries and settlement time through a shared ledger (Correct answer)
- By guaranteeing zero fees in all cases
- By requiring banks to use paper checks
Correct answer: By reducing intermediaries and settlement time through a shared ledger
A shared ledger can cut the chain of correspondent banks and enable faster, more transparent settlement. Compliance obligations such as KYC/AML still apply.
Question 6: What is a common use of blockchain in the public sector?
- Land registry and title recording (Correct answer)
- Replacing all elections with anonymous email
- Printing currency
- Streaming video
Correct answer: Land registry and title recording
Land and property registries benefit from immutable records of ownership and transfer history. Pilots exist in several countries.
