A team is testing an API that returns data in XML format. They want to verify that the XML structure and data types are correct. What is the best approach?

Convert the XML to JSON and test the JSON.

Use schema validation to verify the XML against an XSD.

Check only the HTTP status code of the response.

Use UI testing to verify the data is displayed correctly.

Why is API testing considered essential in a DevOps pipeline?

It provides fast, reliable validation of service behavior, enabling early detection of integration issues before UI testing is possible

It is the only way to test security vulnerabilities in the application

It ensures that the user interface is visually appealing and consistent across browsers

It eliminates the need for any other form of testing, including unit and integration testing

A team is automating API tests for a service that uses test data stored in a shared database. Tests often fail because other teams modify the same data. What is the best practice to make tests reliable?

Ignore test failures caused by data issues and rerun tests later.

Run tests only at night when other teams are not working.

Use production data for testing to ensure realism.

Use data isolation techniques, such as creating dedicated test data per test run.

A team is testing an API that has multiple endpoints. They want to ensure that the API returns consistent error messages for invalid requests. What is the best practice?

Define and test a standard error response format across all endpoints.

Test each endpoint's error messages individually without a standard.

Use different error formats for different endpoints to be flexible.

Only test successful responses to save time.

Which of the following is a common challenge in API testing within a DevOps context?

Avoiding the use of authentication tokens to simplify test execution

Ensuring that the API has a graphical user interface for testers to interact with

Running API tests only once per release to minimize execution time

Managing API versioning and ensuring tests are updated when the API changes

Certified Tester Quality in DevOps

Domain 3Objective 3

API Testing CT-QDO Practice Questions (Page 5)

Part of the Domain 3: Automated and Manual Tasks in DevOps domain, which makes up ~21% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~5–8 in this domain), expect 1–2 from this objective — we provide 29 practice questions to prepare you well beyond it. (estimate)

29questions here

6free pages

6concepts

Questions 21–25

21application · medium
A team is testing an API that returns data in XML format. They want to verify that the XML structure and data types are correct. What is the best approach?
Select an answer first
22foundation · easy
Why is API testing considered essential in a DevOps pipeline?
Select an answer first
23application · medium
A team is automating API tests for a service that uses test data stored in a shared database. Tests often fail because other teams modify the same data. What is the best practice to make tests reliable?
Select an answer first
24application · medium
A team is testing an API that has multiple endpoints. They want to ensure that the API returns consistent error messages for invalid requests. What is the best practice?
Select an answer first
25foundation · easy
Which of the following is a common challenge in API testing within a DevOps context?
Select an answer first

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