What is the role of oracles in the future of blockchain interoperability?

To mine new blocks on a blockchain

To replace the need for consensus algorithms

To bring off-chain data into blockchain applications, enabling smart contracts to react to real-world events

A developer is implementing an atomic swap between two blockchains that have different block times. The HTLC on the faster chain has a timeout of 24 hours, and the HTLC on the slower chain has a timeout of 12 hours. What is the likely consequence?

The swap will complete successfully because the timeouts are different

The swap will be more secure because of the different timeouts

The party on the slower chain may be unable to claim funds before the timeout expires

The swap will fail immediately because timeouts must be identical

A developer wants to build a cross-chain application that can move both tokens and arbitrary messages between multiple heterogeneous blockchains, including ones that are not based on Cosmos SDK. The team prefers a standardized protocol rather than a custom bridge. Which approach should they choose?

Deploy a Polkadot parachain that connects to the relay chain

Implement a custom atomic swap protocol for each pair of chains

Use the Inter-Blockchain Communication (IBC) protocol with a custom adapter for non-Cosmos chains

Adopt a general-purpose interoperability protocol like Axelar or LayerZero that supports multiple heterogeneous chains

What is a potential consequence of validator collusion in a federated bridge?

The bridge changes its consensus algorithm to proof-of-work

Unauthorized minting of tokens on the destination chain

The bridge becomes faster and more efficient

The bridge automatically shuts down and refunds all users

Which strategy can help mitigate the risk of bridge exploits?

Using a single validator to control the bridge

Disabling all smart contract functionality on the bridge

Increasing the number of tokens locked in the bridge

Conducting regular security audits and bug bounty programs

EC-CouncilBlockchain Developer Certification

Domain 9Objective 4

Interoperability Innovations BDC Practice Questions (Page 8)

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

54questions here

11free pages

6concepts

Questions 36–40

36foundation · easy
What is the role of oracles in the future of blockchain interoperability?
Select an answer first
37expert · hard
A developer is implementing an atomic swap between two blockchains that have different block times. The HTLC on the faster chain has a timeout of 24 hours, and the HTLC on the slower chain has a timeout of 12 hours. What is the likely consequence?
Select an answer first
38application · medium
A developer wants to build a cross-chain application that can move both tokens and arbitrary messages between multiple heterogeneous blockchains, including ones that are not based on Cosmos SDK. The team prefers a standardized protocol rather than a custom bridge. Which approach should they choose?
Select an answer first
39foundation · easy
What is a potential consequence of validator collusion in a federated bridge?
Select an answer first
40foundation · easy
Which strategy can help mitigate the risk of bridge exploits?
Select an answer first

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