A developer is building a decentralized exchange (DEX) that needs to support high-frequency trading. They are considering a sidechain with a centralized operator. What is the primary risk they must mitigate to ensure user funds are safe?

The operator could steal funds by submitting invalid state transitions to the main chain

The sidechain may have higher transaction fees than the main chain

The sidechain may not support smart contracts

The sidechain may not be compatible with the main chain's token standard

A privacy-focused cryptocurrency wants to allow users to prove they have sufficient funds for a transaction without revealing their total balance. Which protocol innovation should they implement?

Confidential transactions with homomorphic commitments.

A healthcare consortium is deploying a permissioned blockchain to share patient data among hospitals. They need to ensure that only authorized parties can view specific data fields, but they also need to prove that data has not been tampered with. Which combination of protocol-level innovations best addresses both requirements?

A sharding scheme that isolates each hospital's data

A sidechain for each hospital and a centralized database

Zero-knowledge proofs for all data and a public ledger

Attribute-based encryption (ABE) for fine-grained access control and a hash chain for immutability

A blockchain platform wants to increase its transaction throughput without compromising decentralization. They are considering sharding. Which trade-off must they address?

Increased latency for all transactions due to shard synchronization.

Reduced block size to accommodate more shards.

Cross-shard communication complexity and the risk of shard takeover.

The need for a centralized coordinator to manage shards.

A developer wants to build a dApp that can interact with both Ethereum and a separate blockchain that uses a different consensus algorithm. They want to avoid running a node for each chain. Which interoperability solution should they use?

A sidechain with a two-way peg.

A blockchain interoperability protocol like Polkadot or Cosmos.

A state channel between the two chains.

EC-CouncilBlockchain Developer Certification

Domain 9Objective 1

Architectural and Protocol Innovations BDC Practice Questions (Page 2)

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

33questions here

7free pages

2concepts

Questions 6–10

6expert · hard
A developer is building a decentralized exchange (DEX) that needs to support high-frequency trading. They are considering a sidechain with a centralized operator. What is the primary risk they must mitigate to ensure user funds are safe?
Select an answer first
7application · medium
A privacy-focused cryptocurrency wants to allow users to prove they have sufficient funds for a transaction without revealing their total balance. Which protocol innovation should they implement?
Select an answer first
8application · medium
A healthcare consortium is deploying a permissioned blockchain to share patient data among hospitals. They need to ensure that only authorized parties can view specific data fields, but they also need to prove that data has not been tampered with. Which combination of protocol-level innovations best addresses both requirements?
Select an answer first
9application · medium
A blockchain platform wants to increase its transaction throughput without compromising decentralization. They are considering sharding. Which trade-off must they address?
Select an answer first
10application · medium
A developer wants to build a dApp that can interact with both Ethereum and a separate blockchain that uses a different consensus algorithm. They want to avoid running a node for each chain. Which interoperability solution should they use?
Select an answer first

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