CBC Blockchain Fundamentals & Technologies

Question 1

What is the primary function of blockchain technology?

Accepted Answer

To provide a secure and transparent decentralized ledger

Answer

To store data in a centralized database

Answer

To replace traditional cloud storage systems

Answer

To encrypt private messages only

Question 2

Which consensus mechanism is most commonly used in Bitcoin’s blockchain?

Accepted Answer

Proof of Work (PoW)

Answer

Proof of Stake (PoS)

Answer

Delegated Proof of Stake (DPoS)

Answer

Practical Byzantine Fault Tolerance (PBFT)

Question 3

What makes blockchain immutable?

Accepted Answer

It uses cryptographic hashing and linking

Answer

Data can be freely edited and changed

Answer

It has no security measures

Answer

It depends on a central authority for verification

Question 4

Which feature of blockchain enhances security?

Accepted Answer

Decentralization

Answer

Centralized control

Answer

Unencrypted transactions

Answer

Storing all data in a single node

Question 5

What role do smart contracts play in blockchain technology?

Accepted Answer

They automate transactions based on predefined rules

Answer

They require human verification for execution

Answer

They store large files on the blockchain

Answer

They can be altered after execution

Question 6

Which of the following best describes a public blockchain?

Accepted Answer

It is open to everyone and fully transparent

Answer

It is controlled by a single organization

Answer

It restricts access to specific users

Answer

It operates without any consensus mechanism