CBC CBC Blockchain Architecture & Design 1

Question 1

Which consensus mechanism requires validators to lock up cryptocurrency as collateral to participate in block creation?

Accepted Answer

Proof of Stake

Answer

Proof of Stake requires validators to stake (lock up) cryptocurrency as collateral, which they forfeit if they act dishonestly.

Question 2

In a blockchain network, what is the primary role of a full node?

Accepted Answer

Maintain a complete copy of the blockchain and validate all transactions

Answer

Full nodes store the entire blockchain history and independently validate every transaction and block against the protocol rules.

Question 3

What is the Merkle tree structure used for in blockchain design?

Accepted Answer

Efficiently verifying transaction inclusion in a block

Answer

Merkle trees allow lightweight clients to verify whether a specific transaction is included in a block without downloading the entire block.

Question 4

Which blockchain topology is best suited for a consortium of competing enterprises that require shared data but controlled access?

Accepted Answer

Permissioned consortium blockchain

Answer

A permissioned consortium blockchain allows known, vetted participants to share data while restricting access to unauthorized parties.

Question 5

What does 'sharding' achieve in blockchain architecture?

Accepted Answer

Improves scalability by splitting the network into parallel processing groups

Answer

Sharding partitions the blockchain network into smaller shards that process transactions in parallel, significantly increasing overall throughput.

(CBC) Certified Blockchain Consultant Practice Test