A supply chain company wants to track goods across multiple organizations, each running its own blockchain. They need to ensure that a product's history is consistent and verifiable across all networks. Which approach should they use?

Use a single sidechain for all organizations.

Rely on a layer-2 payment channel for data transfer.

Implement a cross-chain interoperability protocol with a common data standard.

Adopt sharding on each organization's network.

A privacy-preserving voting system needs to ensure that votes are valid and counted correctly without revealing individual voter choices. They also need to prevent double voting. Which protocol innovations should they combine?

Homomorphic encryption for votes and a sidechain for tallying.

Stealth addresses for voter privacy and a centralized tallying authority.

Zero-knowledge proofs for vote validity and a nullifier set to prevent double voting.

Ring signatures for voter anonymity and a public ledger for vote counting.

A blockchain platform is evaluating two scalability solutions: sharding and a layer-2 rollup. The platform must support a large number of independent applications, each with its own state, and must minimize the impact of a security breach in one application on the others. Which solution better isolates failures, and why?

Sharding, because each shard has its own state and consensus, so a breach in one shard does not directly affect other shards

Sharding, because it reduces the number of validators needed

Rollup, because it inherits the security of the main chain

Rollup, because it allows applications to have independent consensus

A consortium of banks wants to settle interbank payments on a permissioned blockchain but must keep transaction amounts confidential from other members while still allowing regulators to audit the total value settled per day. Which protocol-level innovation best satisfies both requirements?

A consensus mechanism that selects a trusted member to view all transactions

Zero-knowledge proofs that validate transactions without revealing amounts, with a regulator key that can decrypt aggregated totals

A sidechain that stores only hashes of transactions on the main chain

A sharding scheme where each bank operates its own shard

EC-CouncilBlockchain Developer Certification

Domain 9Objective 1

Architectural and Protocol Innovations BDC Practice Questions (Page 3)

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

33questions here

7free pages

2concepts

Questions 11–15

11application · medium
A supply chain company wants to track goods across multiple organizations, each running its own blockchain. They need to ensure that a product's history is consistent and verifiable across all networks. Which approach should they use?
Select an answer first
12foundation · easy
Which protocol innovation allows different blockchain networks to exchange data and assets without relying on a centralized intermediary?
Select an answer first
13expert · hard
A privacy-preserving voting system needs to ensure that votes are valid and counted correctly without revealing individual voter choices. They also need to prevent double voting. Which protocol innovations should they combine?
Select an answer first
14expert · hard
A blockchain platform is evaluating two scalability solutions: sharding and a layer-2 rollup. The platform must support a large number of independent applications, each with its own state, and must minimize the impact of a security breach in one application on the others. Which solution better isolates failures, and why?
Select an answer first
15application · medium
A consortium of banks wants to settle interbank payments on a permissioned blockchain but must keep transaction amounts confidential from other members while still allowing regulators to audit the total value settled per day. Which protocol-level innovation best satisfies both requirements?
Select an answer first

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Architectural and Protocol Innovations BDC Practice Questions (Page 3)

Questions 11–15

A supply chain company wants to track goods across multiple organizations, each running its own blockchain. They need to ensure that a product's history is consistent and verifiable across all networks. Which approach should they use?

Which protocol innovation allows different blockchain networks to exchange data and assets without relying on a centralized intermediary?

A privacy-preserving voting system needs to ensure that votes are valid and counted correctly without revealing individual voter choices. They also need to prevent double voting. Which protocol innovations should they combine?

A consortium of banks wants to settle interbank payments on a permissioned blockchain but must keep transaction amounts confidential from other members while still allowing regulators to audit the total value settled per day. Which protocol-level innovation best satisfies both requirements?

Keep studying — Advanced Concepts and Future Innovations