CBSE - Certified Blockchain Security Expert Blockchain System Testing Questions and Answers

Question 1

A quality assurance team is testing a decentralized finance (DeFi) protocol where a lending smart contract must interact with a separate staking contract to determine correct interest rates.
Which type of testing is MOST critical for verifying that a user staking tokens in the second contract correctly updates the available borrowing rates in the first contract?

Accepted Answer

Integration Testing

Answer

Unit Testing

Answer

Fuzz Testing

Answer

Penetration Testing

Question 2

A development team wants to ensure their new decentralized exchange (DEX) can handle an anticipated launch-day load of 1,000 transactions per second (TPS) without significant delays. Which type of system testing should be prioritized to validate this specific non-functional requirement?

Accepted Answer

Performance Testing

Answer

Static Analysis

Answer

Usability Testing

Answer

Regression Testing

Question 3

A team is in the final stages of testing their dApp. They require an environment that closely mimics the public mainnet, including unpredictable block times and potential network congestion, to conduct a final public test run without using real assets. Which environment best suits this need?

Accepted Answer

A public testnet like Sepolia

Answer

A local development blockchain like Ganache

Answer

A static analysis tool like Slither

Answer

A private consortium network

Question 4

What is the primary objective of applying fuzz testing to a smart contract's functions?

Accepted Answer

To automatically discover security vulnerabilities by providing unexpected or random data to function inputs.

Answer

To verify that the business logic aligns with the whitepaper specifications.

Answer

To measure the gas cost of every function under normal operating conditions.

Answer

To ensure the on-chain data structures are optimized for storage.

Question 5

When testing a blockchain application, which of the following presents a unique and fundamental challenge not typically encountered when testing traditional, centralized web applications?

Accepted Answer

The immutability of deployed on-chain code and the difficulty of patching bugs.

Answer

Ensuring the application's user interface is responsive on mobile devices.

Answer

Verifying database read/write permissions for different user roles.

Answer

Checking for cross-browser compatibility issues in the front-end code.

Question 6

A security auditor is using a tool like Slither to analyze a Solidity smart contract's source code before it is compiled or executed. The tool flags several potential vulnerabilities, including reentrancy risks and uninitialized storage pointers. What type of testing is being performed?

Accepted Answer

Static Analysis

Answer

Dynamic Analysis

Answer

Economic Incentive Analysis

Answer

User Acceptance Testing