CBSA Core Blockchain Principles 4

Question 1

In Hyperledger Fabric, what component is responsible for ordering transactions and creating blocks?

Accepted Answer

Ordering service (orderer)

Answer

Peer nodes

Answer

Chaincode containers

Answer

Certificate Authority

Question 2

What is a 'smart contract' oracle problem?

Accepted Answer

Smart contracts cannot natively access real-world off-chain data without a trusted data feed

Answer

Smart contracts cannot execute faster than 1 transaction per second

Answer

Oracles prevent smart contracts from being audited

Answer

Smart contracts are incompatible with oracle database systems

Question 3

Which cryptographic primitive enables digital signatures used to authenticate blockchain transactions?

Accepted Answer

Asymmetric key cryptography (public-private key pairs)

Answer

SHA-256 hashing alone

Answer

Symmetric AES encryption

Answer

MD5 checksums

Question 4

What is the purpose of a 'block header' in a blockchain block?

Accepted Answer

It contains metadata including the previous block hash, timestamp, Merkle root, and nonce

Answer

It stores the full transaction payload

Answer

It lists all network node IP addresses

Answer

It holds validator reward information

Question 5

What distinguishes a 'consortium blockchain' from both public and fully private blockchains?

Accepted Answer

It is governed and operated by a group of organizations rather than a single entity or the public

Answer

It uses no consensus mechanism

Answer

It stores data off-chain exclusively

Answer

All participants share the same private key

Question 6

In blockchain design, what is the CAP theorem's implication for distributed ledger systems?

Accepted Answer

A distributed system can guarantee at most two of: Consistency, Availability, and Partition Tolerance

Answer

A blockchain can simultaneously optimize for cost, accuracy, and performance

Answer

CAP stands for Cryptographic Audit Protocol

Answer

Public blockchains must sacrifice all three properties

Question 7

What is 'tokenization' in a blockchain solution architecture context?

Accepted Answer

Representing real-world assets or rights as digital tokens on a blockchain

Answer

Converting passwords into secure hash tokens

Answer

Generating API authentication tokens for node access

Answer

Breaking smart contracts into smaller deployable units