A DeFi protocol has a governance contract that allows token holders to propose and vote on changes. The team wants to monitor for a governance attack. Which monitoring metric is most useful?

The voting power distribution among token holders

The total number of token holders

The price of the governance token

A consortium blockchain uses a delegated proof-of-stake (DPoS) consensus with 21 elected block producers. The audit team is asked to assess the risk of a Sybil attack. They have limited time and must prioritize the most impactful analysis. Which analysis should they perform first?

Review the network's peer-to-peer layer for IP spoofing vulnerabilities.

Analyze the smart contracts for reentrancy vulnerabilities.

Examine the token distribution and the economic cost for an attacker to acquire enough tokens to vote in a majority of block producers.

Test the block producers' hardware for side-channel vulnerabilities.

A new blockchain network uses a delegated proof-of-stake consensus mechanism. The security team is concerned about a Sybil attack. Which mitigation is most effective?

Require a minimum stake to become a delegate

Monitor the number of delegates

In a proof-of-work blockchain, what is the primary goal of a 51% attack?

To encrypt the blockchain and demand ransom

To gain control of the majority of the network's hash rate to manipulate consensus

To steal private keys of all users

What is the primary purpose of monitoring in a live blockchain system?

To detect anomalies and potential security threats in real time

To automatically fix all vulnerabilities without human intervention

To increase the block reward for miners

To replace the need for regular security audits

EC-CouncilBlockchain Developer Certification

Domain 7Objective 3

Auditing, Testing, and Monitoring in Blockchain Security BDC Practice Questions (Page 4)

Part of the Blockchain Security and DeFi Development domain, which makes up ~11% of our current practice bank.

52questions here

11free pages

9concepts

Questions 16–20

16application · medium
A DeFi protocol has a governance contract that allows token holders to propose and vote on changes. The team wants to monitor for a governance attack. Which monitoring metric is most useful?
Select an answer first
17expert · hard
A consortium blockchain uses a delegated proof-of-stake (DPoS) consensus with 21 elected block producers. The audit team is asked to assess the risk of a Sybil attack. They have limited time and must prioritize the most impactful analysis. Which analysis should they perform first?
Select an answer first
18application · medium
A new blockchain network uses a delegated proof-of-stake consensus mechanism. The security team is concerned about a Sybil attack. Which mitigation is most effective?
Select an answer first
19foundation · easy
In a proof-of-work blockchain, what is the primary goal of a 51% attack?
Select an answer first
20foundation · easy
What is the primary purpose of monitoring in a live blockchain system?
Select an answer first

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