ISTQB Certified Tester Foundation Level (CTFL 2018) — Question 28

When can functional and structural testing BOTH be applied?

Answer options

• A. System and Component test levels only.
• B. All 'Development' test levels, i.e. those before Acceptance testing.
• C. Component and Component integration test levels only.
• D. All test levels.

Correct answer: D

Explanation

The correct answer is D because both functional and structural testing can be used in all stages of testing, from unit tests to system tests. Options A, B, and C are incorrect as they limit the application of these testing types to specific levels, whereas in practice, they are applicable across all levels.