A developer is designing a privacy-preserving token on a public blockchain. They need to hide transaction amounts and sender/receiver identities, but they also want to allow regulatory authorities to audit transactions under certain conditions. Which protocol innovation should they implement?

Homomorphic encryption with no key management.

Confidential transactions with range proofs and selective disclosure via view keys.

What is the primary purpose of a sidechain in blockchain architecture?

To provide a communication layer between different blockchain networks

To process transactions off the main chain while inheriting its full security

To increase the main chain's block size by storing transaction data off-chain

To enable faster and cheaper transactions by moving them to a separate chain with its own consensus

A startup is launching a decentralized application that requires high throughput and low latency. They are considering a sidechain architecture with a set of known validators. What is the primary trade-off they must accept compared to a mainnet deployment?

Permanent loss of assets if the sidechain is compromised

Incompatibility with the Ethereum Virtual Machine (EVM)

Higher gas costs due to additional cross-chain communication

Reduced decentralization and increased trust in the sidechain validators

What is the primary purpose of a privacy-preserving technique like a zero-knowledge proof in a blockchain protocol?

To verify a statement's truth without revealing the underlying data

To increase transaction throughput by compressing multiple transactions into one

To enable cross-chain asset transfers without a trusted intermediary

To replace proof-of-work with a more energy-efficient consensus mechanism

EC-CouncilBlockchain Developer Certification

Domain 9Objective 1

Architectural and Protocol Innovations BDC Practice Questions (Page 1)

Part of the Advanced Concepts and Future Innovations domain, which makes up ~12% of our current practice bank.

33questions here

7free pages

2concepts

Questions 1–5

1expert · hard
A developer is designing a privacy-preserving token on a public blockchain. They need to hide transaction amounts and sender/receiver identities, but they also want to allow regulatory authorities to audit transactions under certain conditions. Which protocol innovation should they implement?
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2foundation · easy
What is the primary purpose of a sidechain in blockchain architecture?
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3application · medium
A startup is launching a decentralized application that requires high throughput and low latency. They are considering a sidechain architecture with a set of known validators. What is the primary trade-off they must accept compared to a mainnet deployment?
Select an answer first
4foundation · easy
What is the primary purpose of a privacy-preserving technique like a zero-knowledge proof in a blockchain protocol?
Select an answer first
5foundation · easy
Which architectural innovation partitions the blockchain state and transaction processing into multiple parallel segments to increase throughput, while introducing cross-segment communication overhead?
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