CCA Blockchain Fundamentals

Question 1

What is a blockchain?

Accepted Answer

A distributed digital ledger

Answer

A blockchain is a distributed ledger that records transactions in a secure, transparent, and tamper-evident way.

Question 2

What is the function of a block in blockchain?

Accepted Answer

Holds transaction records and hashes

Answer

Each block contains a batch of verified transactions and links to the previous block, forming a chain.

Question 3

What makes blockchain data immutable?

Accepted Answer

Consensus and cryptographic hashing

Answer

Cryptographic hashes and consensus mechanisms ensure that data cannot be changed without detection.

Question 4

What is a public blockchain?

Accepted Answer

A permissionless distributed ledger

Answer

A public blockchain is open to anyone and is maintained by a decentralized network of nodes.

Question 5

Which of the following best describes consensus mechanisms?

Accepted Answer

They ensure agreement on the ledger state

Answer

Consensus mechanisms like Proof of Work or Proof of Stake validate transactions and secure the blockchain network.

(CCA) Certified Cryptocurrency Auditor Practice Test