A DAO uses a governance token with a 7-day voting period and a 48-hour timelock before execution. A developer notices that a large holder can borrow governance tokens from a lending protocol right before a vote, vote, and return them after the proposal passes. Which mitigation is most effective against this specific attack?

Require a minimum token-holding period before voting

Use a quadratic voting mechanism

Delegate voting power to a trusted committee

Increase the timelock duration to 7 days

How can a flash loan be used to manipulate a governance vote?

By lending governance tokens to other voters to increase their voting power

By borrowing a small amount of tokens to trigger a quorum requirement

By using a flash loan to pay off voters' debts and gain their support

By borrowing a large amount of governance tokens temporarily to gain voting power, then repaying the loan

Which characteristic is a core principle of decentralized finance (DeFi)?

Permissioned access controlled by a central authority

Opaque governance and hidden transaction details

Permissionless access, transparency, and composability

Isolated protocols that cannot interact with each other

A DeFi lending protocol allows users to deposit collateral and borrow assets. The protocol's smart contract uses a `delegatecall` to a library for price updates. What is the primary security risk of using `delegatecall` in this context?

`delegatecall` cannot be used with external libraries

`delegatecall` is slower and consumes more gas than a regular call

The library can modify the caller's storage, leading to unexpected state changes if the library is compromised

`delegatecall` is deprecated and will not work on modern blockchains

EC-CouncilBlockchain Developer Certification

Domain 7Objective 6

DeFi Smart Contracts and Governance BDC Practice Questions (Page 8)

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

42questions here

9free pages

6concepts

Questions 36–40

36application · medium
A DAO uses a governance token with a 7-day voting period and a 48-hour timelock before execution. A developer notices that a large holder can borrow governance tokens from a lending protocol right before a vote, vote, and return them after the proposal passes. Which mitigation is most effective against this specific attack?
Select an answer first
37foundation · easy
How can a flash loan be used to manipulate a governance vote?
Select an answer first
38foundation · easy
Which characteristic is a core principle of decentralized finance (DeFi)?
Select an answer first
39foundation · easy
Which of the following is a common smart contract vulnerability?
Select an answer first
40application · medium
A DeFi lending protocol allows users to deposit collateral and borrow assets. The protocol's smart contract uses a `delegatecall` to a library for price updates. What is the primary security risk of using `delegatecall` in this context?
Select an answer first

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DeFi Smart Contracts and Governance BDC Practice Questions (Page 8)

Questions 36–40

How can a flash loan be used to manipulate a governance vote?

Which characteristic is a core principle of decentralized finance (DeFi)?

Which of the following is a common smart contract vulnerability?

A DeFi lending protocol allows users to deposit collateral and borrow assets. The protocol's smart contract uses a `delegatecall` to a library for price updates. What is the primary security risk of using `delegatecall` in this context?

Keep studying — Blockchain Security and DeFi Development