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Certified Blockchain Expert (CBE) [blockchain]

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About this Exam

Prepare with the Certified Blockchain Expert (CBE) [blockchain] practice quiz. This question bank includes 100 questions covering blockchain, primary, transaction, block, and consensus. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

Sample Questions

Question 1
A consortium of financial institutions wants to build a distributed ledger for trade finance. Their primary requirements are strict data privacy where only parties involved in a transaction can view its details, and the absence of a volatile native cryptocurrency. Which blockchain platform is architecturally designed around a 'need-to-know' data distribution model rather than a global broadcast channel?
Public Ethereum Mainnet
Hyperledger Fabric
Corda
Bitcoin
Question 2
In the architecture of Hyperledger Fabric, what is the specific and crucial role of the 'Ordering Service'?
To execute smart contract logic (chaincode) and endorse transactions.
To maintain the world state database for a specific channel.
To issue and validate digital certificates for network participants.
To establish a total order of transactions and package them into blocks to be distributed to peers.
Question 3
A public blockchain is struggling with high transaction fees and slow confirmation times due to network congestion. The development team decides to implement 'sharding' as a long-term scalability solution. What is the primary principle behind sharding?
Processing transactions on a separate, faster chain and later batching the results onto the main chain.
Increasing the block size limit to include more transactions in each block.
Partitioning the network's state and transaction processing load across multiple parallel sub-chains.
Requiring validators to stake more collateral to increase the economic security of the network.
Question 4
A development team needs to build a decentralized application (dApp) that can transfer a specific token from the Ethereum network to the Avalanche network without using a centralized intermediary. Which type of technology is specifically designed to facilitate this kind of cross-chain asset transfer and communication?
A blockchain oracle
An interoperability protocol or cross-chain bridge
A Layer-2 optimistic rollup
A state channel
Question 5
In the context of a modular blockchain architecture, such as the one Ethereum is migrating towards, which layer is primarily responsible for processing transactions, executing smart contract code, and managing changes to the blockchain's state?
Execution Layer
Consensus Layer
Data Availability Layer
Networking Layer

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Additional Information

Certified Blockchain Expert (CBE) [blockchain]

This practice set contains 100 questions from the matching question bank and focuses on blockchain, primary, transaction, block, and consensus. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Frequently Asked Questions

This quiz contains a total of 100 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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