ISTQB Test Levels and Types 1 — Questions and Answers
Question 1: Which test level focuses on verifying that individual components work correctly together?
- Unit testing
- Integration testing (Correct answer)
- System testing
- Acceptance testing
Correct answer: Integration testing
Integration testing verifies that components or systems interact correctly with each other, focusing on interfaces and interactions.
Question 2: Who typically performs unit (component) testing according to ISTQB?
- End users
- Business analysts
- Developers (Correct answer)
- Independent test teams
Correct answer: Developers
Unit testing is typically performed by the developers who wrote the code, using white-box techniques to test individual components in isolation.
Question 3: What is the primary objective of system testing?
- Verify individual components in isolation
- Validate interfaces between modules
- Verify the complete integrated system meets specified requirements (Correct answer)
- Confirm the system meets user business needs
Correct answer: Verify the complete integrated system meets specified requirements
System testing evaluates the complete integrated system to verify it meets the specified functional and non-functional requirements.
Question 4: Which test level is most closely associated with validating that a system meets business processes and user workflows?
- Component testing
- Integration testing
- System testing
- User acceptance testing (UAT) (Correct answer)
Correct answer: User acceptance testing (UAT)
UAT validates that the system meets the needs of users and stakeholders by testing it against real business scenarios and workflows.
Question 5: In integration testing, what is a 'stub'?
- A defect logged during integration
- A simplified replacement for a called component (Correct answer)
- A test environment configuration script
- A coverage metric for integration tests
Correct answer: A simplified replacement for a called component
A stub is a simplified implementation that replaces a called (lower-level) component, allowing the calling component to be tested in isolation.
Question 6: Which ISTQB statement about test levels is MOST accurate?
- Test levels must always be executed strictly sequentially
- Each test level has its own specific test objectives and test basis (Correct answer)
- Unit testing always occurs before requirements are defined
- System testing always precedes integration testing
Correct answer: Each test level has its own specific test objectives and test basis
ISTQB defines each test level by distinct test objectives, a specific test basis, test objects, typical defects, and appropriate techniques.
Question 7: At which test level are user stories most commonly used as the test basis in Agile development?
- Component testing
- Integration testing
- System testing
- Acceptance testing (Correct answer)
Correct answer: Acceptance testing
In Agile, acceptance testing often uses user stories and acceptance criteria as the test basis to validate business value from the user's perspective.
ISTQB Test Levels and Types 1
Which test level focuses on verifying that individual components work correctly together?