ISTQB Test Analyst Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q1Which white-box test technique focuses on ensuring that each executable statement in the code is executed at least once during testing?
✓ Correct answer: D. Statement testing
Statement testing (also called statement coverage) aims to ensure each executable statement in the code is executed at least once during testing. It's the most basic form of white-box testing coverage.
Q2Which of the following coverage levels provides the strongest logical test coverage?
✓ Correct answer: C. Modified condition/decision coverage (MC/DC)
Modified condition/decision coverage (MC/DC) requires that each condition in a decision independently affects the outcome of the decision, making it stronger than the other options in detecting logical defects.
Q3In the context of white-box testing, what is the main advantage of decision testing over statement testing?
✓ Correct answer: B. It ensures all branches or decision outcomes are tested
Decision testing ensures that all branches or decision outcomes are tested, which provides better test coverage than statement testing by ensuring that both true and false paths in conditions are executed.
Q4A team is using multiple condition testing on a complex financial application. What is this technique primarily designed to evaluate?
✓ Correct answer: A. All possible combinations of condition outcomes within a decision
Multiple condition testing evaluates all possible combinations of condition outcomes within a decision, making it especially useful for testing complex logical expressions where each combination could lead to different behavior.
Q5Which metric would a technical test analyst use to measure decision coverage in a codebase?
✓ Correct answer: D. Percentage of decision outcomes exercised by tests
Decision coverage is measured by calculating the percentage of decision outcomes that have been exercised by test cases, determining how many of the possible true/false paths have been tested.
Q6Which white-box technique would be MOST appropriate for testing critical aerospace software where safety is the primary concern?
✓ Correct answer: C. Modified condition/decision coverage (MC/DC)
Modified condition/decision coverage (MC/DC) is often required for safety-critical systems like aerospace software because it ensures each condition in a decision independently affects the outcome, providing thorough testing of complex logical expressions.
Q7When designing API tests using white-box techniques, which of the following would be a primary focus area?
✓ Correct answer: B. Parameter combinations and boundary values
Parameter combinations and boundary values are critical for API testing because they help verify the API handles various input combinations correctly, including edge cases and invalid inputs.
Q8If a technical test analyst achieves 100% statement coverage but only 70% decision coverage, what does this indicate about the test suite?
✓ Correct answer: A. Some decision outcomes have not been tested
This situation indicates that some decision outcomes (typically false conditions) have not been tested, despite executing all statements. This is possible because statement coverage does not ensure all decision paths are exercised.
Q9When using condition coverage for testing, what key aspect of the code is being verified?
✓ Correct answer: D. Each Boolean sub-expression evaluates to both true and false
Condition coverage focuses on ensuring each Boolean sub-expression (condition) evaluates to both true and false, which helps identify defects in individual conditions that might be masked when testing only the overall decision outcome.
Q10What is a key consideration when designing test cases for multiple condition coverage?
✓ Correct answer: C. The number of test cases grows exponentially with the number of conditions
Multiple condition coverage requires testing all possible combinations of conditions, so the number of test cases grows exponentially with the number of conditions, making test case design more complex for decisions with many conditions.
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