CBSE Credential Curriculum and Topics 2

Question 1

Which domain of the CBSE curriculum specifically addresses vulnerabilities in Ethereum smart contract code?

Accepted Answer

Smart Contract Security

Answer

Smart Contract Security is the CBSE domain dedicated to identifying and remediating vulnerabilities such as reentrancy, integer overflow, and access control flaws in smart contract code.

Question 2

The CBSE exam places emphasis on understanding threat modeling. Which framework is most commonly referenced for blockchain threat modeling in the curriculum?

Accepted Answer

STRIDE

Answer

STRIDE (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege) is the most widely referenced threat modeling framework in blockchain security curricula including CBSE.

Question 3

A CBSE candidate must understand 51% attacks. What resource does an attacker need to control to execute one on a Proof-of-Work network?

Accepted Answer

More than half of the network's total hashing power

Answer

A 51% attack on a Proof-of-Work blockchain requires an attacker to control more than 50% of the network's total hash rate, enabling double-spend and chain reorganization.

Question 4

Which CBSE curriculum topic covers the security implications of using oracles in decentralized applications?

Accepted Answer

DeFi and Oracle Security

Answer

DeFi and Oracle Security is the CBSE domain that examines how oracles introduce off-chain data trust assumptions and can be manipulated to compromise on-chain logic.

Question 5

According to the CBSE body of knowledge, which attack exploits a smart contract calling an external contract before updating its own state?

Accepted Answer

Reentrancy

Answer

A reentrancy attack occurs when a malicious contract repeatedly calls back into the vulnerable contract before the initial execution updates its balance or state, as seen in the 2016 DAO hack.

(CBSE) Certified Blockchain Security Expert Practice Test

(CBSE) Certified Blockchain Security Expert Practice Test

CBSE Credential Curriculum and Topics 2