CCE Blockchain Fundamentals 2

Question 1

What is the primary purpose of a Merkle tree in blockchain architecture?

Accepted Answer

To efficiently verify the integrity of large datasets

Answer

Merkle trees allow any transaction in a block to be verified by checking only a logarithmic number of hashes rather than the entire dataset.

Question 2

Which characteristic best describes a 'permissioned' blockchain?

Accepted Answer

Participation requires authorization from a governing entity

Answer

Permissioned blockchains restrict who can join and transact, making them common in enterprise and consortium settings.

Question 3

In blockchain terminology, what is a 'genesis block'?

Accepted Answer

The very first block in a blockchain

Answer

The genesis block (block 0) is hard-coded as the starting point of a blockchain with no predecessor hash.

Question 4

What does 'block finality' mean in the context of blockchain?

Accepted Answer

A confirmed block can never be reversed or altered

Answer

Finality guarantees that once a block is confirmed, its transactions are irreversible and permanently part of the ledger.

Question 5

How does a hard fork differ from a soft fork?

Accepted Answer

A hard fork creates a permanent chain split; a soft fork remains backward-compatible

Answer

A hard fork introduces protocol changes that non-upgraded nodes cannot follow, potentially creating two separate chains, while a soft fork is backward-compatible.

(CCE) Certified Cryptocurrency Expert Practice Test

(CCE) Certified Cryptocurrency Expert Practice Test

CCE Blockchain Fundamentals 2