A team is writing unit tests for a class that calls an external REST API. They need to isolate the class under test and verify its interaction with the API. Which approach is most appropriate for this level of testing?

Use a mock object that simulates the API client and verifies method calls.

Use a stub that returns fixed responses without verifying interactions.

Test against the real API in the test environment.

Deploy a service virtualization instance that mimics the entire REST API.

A team uses service virtualization to simulate a legacy mainframe system during system testing. After the mainframe team provides a test instance, the team wants to ensure that the system works correctly with the real mainframe. What should the team do?

Run a subset of tests against the real mainframe to validate the virtual service's accuracy.

Delete the virtual service configuration to save resources.

Replace the virtual service with the real mainframe for all future tests.

Continue using the virtual service for all tests to avoid any risk of impacting the mainframe.

A team is testing a microservices-based application. One microservice is developed by an external vendor and is only available in a staging environment that is shared and unstable. The team needs to run performance tests that require a stable environment. What is the most appropriate action?

Ask the vendor to provide a dedicated instance for performance testing.

Run performance tests against the shared staging environment despite its instability.

Use service virtualization to simulate the vendor's microservice in a controlled test environment.

Use mocks within the performance test scripts to simulate the microservice.

A team is writing automated tests for a system that integrates with multiple external services. They need to test the system's behavior when one of the services is unavailable. What is the most appropriate approach?

Disable the service in the test environment and run the tests.

Use a mock object to simulate the unavailable service in the integration test.

Use a stub that returns an error response for the unavailable service.

Use service virtualization to simulate the unavailable service and test the system's error handling.

What is the primary purpose of service virtualization in an agile testing context?

To replace all real services with virtual ones in production to reduce operational costs.

To increase the speed of the production system by caching responses from external services.

To enable testing of a component or system when its dependencies are unavailable, incomplete, or difficult to access.

To provide a secure way to expose internal APIs to external partners for integration testing.

Certified Tester Advanced Level Agile Technical Tester

Domain 4Objective 2

Service Virtualization CT-ATT Practice Questions (Page 1)

Part of the Deployment and Delivery domain, which makes up ~20% of our current practice bank. ISTQB does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–12 in this domain), expect 4–6 from this objective — we provide 25 practice questions to prepare you well beyond it. (estimate)

25questions here

5free pages

6concepts

Questions 1–5

1application · medium
A team is writing unit tests for a class that calls an external REST API. They need to isolate the class under test and verify its interaction with the API. Which approach is most appropriate for this level of testing?
Select an answer first
2application · medium
A team uses service virtualization to simulate a legacy mainframe system during system testing. After the mainframe team provides a test instance, the team wants to ensure that the system works correctly with the real mainframe. What should the team do?
Select an answer first
3application · medium
A team is testing a microservices-based application. One microservice is developed by an external vendor and is only available in a staging environment that is shared and unstable. The team needs to run performance tests that require a stable environment. What is the most appropriate action?
Select an answer first
4expert · hard
A team is writing automated tests for a system that integrates with multiple external services. They need to test the system's behavior when one of the services is unavailable. What is the most appropriate approach?
Select an answer first
5foundation · easy
What is the primary purpose of service virtualization in an agile testing context?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to CT-ATT

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by ISTQB. “CT-ATT” is a trademark of its owner, used for identification only.