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Exam Code: CTFL v4.0

Exam Name Certified Tester Foundation Level (CTFL) v4.0

Certification Provider: ISTQB

Corresponding Certification: CTFL

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ISTQB CTFL v4.0 Practice Test 3

Question 20

A tester is asked to evaluate the following situation: A retailer reviews product requirements only after code is deployed and discovers an ambiguous return window that all developers implemented differently. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Require evidence-based release statements with explicit scope and remaining uncertainty.
  2. Reassess test objectives and coverage whenever requirements or risk profiles change.
  3. Schedule requirement reviews and examples before implementation begins.
  4. Link test refresh decisions to significant changes in product and risk.

Explanation

Correct Answer

C:

This safeguard specifically targets the contributing cause: Schedule requirement reviews and examples before implementation begins. It addresses the principle (Testing also includes static evaluation of work products and early defect prevention, not just running software.) and can be assessed by: A revised requirement gives one unambiguous return window and related tests agree with that interpretation.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 1.1): An online marketplace releases a checkout flow after tests show no errors, and its sponsor declares the service mathematically defect free. The targeted safeguard for the current case is: Schedule requirement reviews and examples before implementation begins.

B:

This preventive step mitigates a different project risk (syllabus section 1.1): A finance project runs the same ten positive-path checks on every release and calls that sufficient evidence for tax rounding changes. The targeted safeguard for the current case is: Schedule requirement reviews and examples before implementation begins.

D:

This preventive step mitigates a different project risk (syllabus section 1.3): A newly launched API passes all tests, so product leadership claims no further testing is needed even though the business model will change next month. The targeted safeguard for the current case is: Schedule requirement reviews and examples before implementation begins.

Question 21

A quality engineering exercise presents this condition: A mobile banking tester documents a wrong transfer confirmation message but the project manager counts the ticket itself as a completed correction. Which testing activity or corrective action best addresses this situation?

  1. Compare observed totals with the pricing rule and report any discrepancy without assuming where the defect resides.
  2. Identify what is intentionally checked against an expectation and distinguish that from passive operational monitoring.
  3. Prioritize representative combinations and high-risk cases rather than promising exhaustive input coverage.
  4. Separate identification and reporting of a defect from the developer's correction and subsequent retest.

Explanation

Correct Answer

D:

The targeted action is: Separate identification and reporting of a defect from the developer's correction and subsequent retest. It addresses the underlying software-testing principle: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities. The relevant confirming evidence is: The defect has a confirmed fix and a passing repeat of the initially failing case.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 1.1, What is Testing?): A billing team treats checking an invoice against its written pricing rules as debugging, and asks testers to locate the faulty line of code before reporting any mismatch. The present problem instead depends on: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.

B:

This choice is a useful response to a different testing situation (section 1.1, What is Testing?): A streaming provider considers all monitoring alerts to be test cases, although the alerts only collect production symptoms after deployment. The present problem instead depends on: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.

C:

This choice is a useful response to a different testing situation (section 1.3, Testing Principles): A travel-site team executes every conceivable destination, browser, payment, and language combination in its test plan despite an impossible schedule. The present problem instead depends on: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.

Question 22

A quality engineering exercise presents this condition: A mobile banking tester documents a wrong transfer confirmation message but the project manager counts the ticket itself as a completed correction. Which observation best verifies that the stated testing issue is addressed?

  1. The saved case records test data, the expected calculation, observed total, and pass or fail decision.
  2. The release decision includes tested conditions and known untested combinations rather than a zero-defect guarantee.
  3. The defect has a confirmed fix and a passing repeat of the initially failing case.
  4. A follow-up case demonstrates the unexpected behavior and identifies its business impact.

Explanation

Correct Answer

C:

This is the expected verification outcome: The defect has a confirmed fix and a passing repeat of the initially failing case. It directly checks the corrective activity (Separate identification and reporting of a defect from the developer's correction and subsequent retest.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A delivery-app tester executes scripted checks but does not record the expected result for a promotional fee calculation, so a different fee is accepted as correct. It does not establish the required result for this case: The defect has a confirmed fix and a passing repeat of the initially failing case.

B:

This result may validate another testing scenario: An online marketplace releases a checkout flow after tests show no errors, and its sponsor declares the service mathematically defect free. It does not establish the required result for this case: The defect has a confirmed fix and a passing repeat of the initially failing case.

D:

This result may validate another testing scenario: A junior tester mechanically executes a checklist even after seeing a new failure pattern that the steps do not cover. It does not establish the required result for this case: The defect has a confirmed fix and a passing repeat of the initially failing case.

Question 23

A quality engineering exercise presents this condition: A mobile banking tester documents a wrong transfer confirmation message but the project manager counts the ticket itself as a completed correction. Which testing concept or underlying cause best explains the reported problem?

  1. Tests require an oracle or stated expected outcome to distinguish acceptable behavior from unexpected results.
  2. Operational monitoring can supply useful test information but is not identical to executing a designed test with an oracle.
  3. A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.
  4. Repeated unchanged tests can become less effective at finding new defects, called the pesticide paradox.

Explanation

Correct Answer

C:

The most relevant explanation is: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities. This describes why the original situation (A mobile banking tester documents a wrong transfer confirmation message but the project manager counts the ticket itself as a completed correction.) merits the response: Separate identification and reporting of a defect from the developer's correction and subsequent retest.

Incorrect Answers

A:

This principle could explain a different testing issue: A delivery-app tester executes scripted checks but does not record the expected result for a promotional fee calculation, so a different fee is accepted as correct. The present case is better explained by: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.

B:

This principle could explain a different testing issue: A streaming provider considers all monitoring alerts to be test cases, although the alerts only collect production symptoms after deployment. The present case is better explained by: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.

D:

This principle could explain a different testing issue: An online examination team runs the identical dataset every sprint and sees fewer new findings, treating this as proof the application has become defect free. The present case is better explained by: A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.

Question 24

A quality engineering exercise presents this condition: A mobile banking tester documents a wrong transfer confirmation message but the project manager counts the ticket itself as a completed correction. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Include a reviewed expected-result field in the test case design standard.
  2. Link important observed production incidents to reproducible regression cases.
  3. Review high-impact business rules using independent examples and representative data.
  4. Track defect states and require tested evidence before marking fixes closed.

Explanation

Correct Answer

D:

This safeguard specifically targets the contributing cause: Track defect states and require tested evidence before marking fixes closed. It addresses the principle (A defect report is evidence of a problem; correction and confirmation testing are distinct subsequent activities.) and can be assessed by: The defect has a confirmed fix and a passing repeat of the initially failing case.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 1.1): A delivery-app tester executes scripted checks but does not record the expected result for a promotional fee calculation, so a different fee is accepted as correct. The targeted safeguard for the current case is: Track defect states and require tested evidence before marking fixes closed.

B:

This preventive step mitigates a different project risk (syllabus section 1.1): A streaming provider considers all monitoring alerts to be test cases, although the alerts only collect production symptoms after deployment. The targeted safeguard for the current case is: Track defect states and require tested evidence before marking fixes closed.

C:

This preventive step mitigates a different project risk (syllabus section 1.2): A subscription startup skips testing after its lead developer says careful coding alone guarantees correct billing for every tax region. The targeted safeguard for the current case is: Track defect states and require tested evidence before marking fixes closed.

Question 25

A software testing team encounters the following project situation: A team runs an API security test that unexpectedly deletes a staging account, then argues that any test causing impact is inherently unsuccessful. Which testing activity or corrective action best addresses this situation?

  1. Evaluate whether the deliberate destructive behavior was authorized and whether the observed result met its test objective.
  2. Analyze the changed rules and select new negative, boundary, and exception tests appropriate to the change.
  3. Establish high-level test goals and approach separately from specific test conditions, cases, and procedures.
  4. Introduce early review and test activities where design decisions are still inexpensive to change.

Explanation

Correct Answer

A:

The targeted action is: Evaluate whether the deliberate destructive behavior was authorized and whether the observed result met its test objective. It addresses the underlying software-testing principle: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance. The relevant confirming evidence is: A safely scoped deletion test yields the expected access denial and no unauthorized account removal.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 1.1, What is Testing?): A finance project runs the same ten positive-path checks on every release and calls that sufficient evidence for tax rounding changes. The present problem instead depends on: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.

C:

This choice is a useful response to a different testing situation (section 1.1, What is Testing?): A warehouse team treats a test strategy statement and the executable test cases as interchangeable, leaving no defined approach to choosing cases. The present problem instead depends on: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.

D:

This choice is a useful response to a different testing situation (section 1.3, Testing Principles): A bank queues all security testing for the final release weekend, and a permissions architecture defect forces a redesign. The present problem instead depends on: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.

Question 26

A software testing team encounters the following project situation: A team runs an API security test that unexpectedly deletes a staging account, then argues that any test causing impact is inherently unsuccessful. Which observation best verifies that the stated testing issue is addressed?

  1. The test record identifies the incorrect total and reproducing input, while developer debugging is handled separately.
  2. The release decision includes tested conditions and known untested combinations rather than a zero-defect guarantee.
  3. The test plan covers historically defect-prone graphics and newly critical payment interfaces.
  4. A safely scoped deletion test yields the expected access denial and no unauthorized account removal.

Explanation

Correct Answer

D:

This is the expected verification outcome: A safely scoped deletion test yields the expected access denial and no unauthorized account removal. It directly checks the corrective activity (Evaluate whether the deliberate destructive behavior was authorized and whether the observed result met its test objective.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A billing team treats checking an invoice against its written pricing rules as debugging, and asks testers to locate the faulty line of code before reporting any mismatch. It does not establish the required result for this case: A safely scoped deletion test yields the expected access denial and no unauthorized account removal.

B:

This result may validate another testing scenario: An online marketplace releases a checkout flow after tests show no errors, and its sponsor declares the service mathematically defect free. It does not establish the required result for this case: A safely scoped deletion test yields the expected access denial and no unauthorized account removal.

C:

This result may validate another testing scenario: A mobile game team decides to test only its newest animations after finding many prior defects there, overlooking a newly connected payment component. It does not establish the required result for this case: A safely scoped deletion test yields the expected access denial and no unauthorized account removal.

Question 27

A software testing team encounters the following project situation: A team runs an API security test that unexpectedly deletes a staging account, then argues that any test causing impact is inherently unsuccessful. Which testing concept or underlying cause best explains the reported problem?

  1. Tests can demonstrate the presence of failures but cannot establish exhaustive absence of defects.
  2. Verification against specified features does not by itself establish user-focused validation of the product's intended purpose.
  3. Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.
  4. Independence can reveal assumption-based blind spots but is not an absolute requirement for all testing.

Explanation

Correct Answer

C:

The most relevant explanation is: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance. This describes why the original situation (A team runs an API security test that unexpectedly deletes a staging account, then argues that any test causing impact is inherently unsuccessful.) merits the response: Evaluate whether the deliberate destructive behavior was authorized and whether the observed result met its test objective.

Incorrect Answers

A:

This principle could explain a different testing issue: An online marketplace releases a checkout flow after tests show no errors, and its sponsor declares the service mathematically defect free. The present case is better explained by: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.

B:

This principle could explain a different testing issue: A healthcare scheduling team calls a product successful after every implemented feature works, though nurses cannot efficiently complete the real appointment task. The present case is better explained by: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.

D:

This principle could explain a different testing issue: A component's author is the only person testing it and consistently overlooks the same assumptions embedded in both code and test data. The present case is better explained by: Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.

Question 28

A software testing team encounters the following project situation: A team runs an API security test that unexpectedly deletes a staging account, then argues that any test causing impact is inherently unsuccessful. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Maintain a clear artifact hierarchy from objectives to conditions, cases, and procedures.
  2. Reassess test objectives and coverage whenever requirements or risk profiles change.
  3. Define expected impact, isolation, and safeguards before negative or destructive tests.
  4. Maintain practical readiness criteria for test runs.

Explanation

Correct Answer

C:

This safeguard specifically targets the contributing cause: Define expected impact, isolation, and safeguards before negative or destructive tests. It addresses the principle (Testing objectives can include finding failures, providing information about risk, and checking constraints, not merely making steps execute without disturbance.) and can be assessed by: A safely scoped deletion test yields the expected access denial and no unauthorized account removal.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 1.1): A warehouse team treats a test strategy statement and the executable test cases as interchangeable, leaving no defined approach to choosing cases. The targeted safeguard for the current case is: Define expected impact, isolation, and safeguards before negative or destructive tests.

B:

This preventive step mitigates a different project risk (syllabus section 1.1): A finance project runs the same ten positive-path checks on every release and calls that sufficient evidence for tax rounding changes. The targeted safeguard for the current case is: Define expected impact, isolation, and safeguards before negative or destructive tests.

D:

This preventive step mitigates a different project risk (syllabus section 1.4): A release manager orders test execution before the shared environment, data and access rights exist and then treats every infrastructure failure as a product defect. The targeted safeguard for the current case is: Define expected impact, isolation, and safeguards before negative or destructive tests.

Question 29

During a release-readiness review, a tester observes: A finance project runs the same ten positive-path checks on every release and calls that sufficient evidence for tax rounding changes. Which testing activity or corrective action best addresses this situation?

  1. Identify what is intentionally checked against an expectation and distinguish that from passive operational monitoring.
  2. Test representative end-user workflows and fitness for use alongside conformance to individual specifications.
  3. Verify intended conditions and expected results actually executed, not merely that a runner exited successfully.
  4. Analyze the changed rules and select new negative, boundary, and exception tests appropriate to the change.

Explanation

Correct Answer

D:

The targeted action is: Analyze the changed rules and select new negative, boundary, and exception tests appropriate to the change. It addresses the underlying software-testing principle: Repeating an unchanged test suite may no longer achieve the objective of detecting defects introduced by new behavior. The relevant confirming evidence is: Newly introduced rounding boundary failures become visible in test results before release.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 1.1, What is Testing?): A streaming provider considers all monitoring alerts to be test cases, although the alerts only collect production symptoms after deployment. The present problem instead depends on: Repeating an unchanged test suite may no longer achieve the objective of detecting defects introduced by new behavior.

B:

This choice is a useful response to a different testing situation (section 1.1, What is Testing?): A healthcare scheduling team calls a product successful after every implemented feature works, though nurses cannot efficiently complete the real appointment task. The present problem instead depends on: Repeating an unchanged test suite may no longer achieve the objective of detecting defects introduced by new behavior.

C:

This choice is a useful response to a different testing situation (section 1.4, Test Activities, Testware and Test Roles): An engineer records all tests as passed because the execution script returned exit code zero, although assertions were skipped in one module. The present problem instead depends on: Repeating an unchanged test suite may no longer achieve the objective of detecting defects introduced by new behavior.

Question 30

During a release-readiness review, a tester observes: A finance project runs the same ten positive-path checks on every release and calls that sufficient evidence for tax rounding changes. Which observation best verifies that the stated testing issue is addressed?

  1. The saved case records test data, the expected calculation, observed total, and pass or fail decision.
  2. Newly introduced rounding boundary failures become visible in test results before release.
  3. A safely scoped deletion test yields the expected access denial and no unauthorized account removal.
  4. Refreshed tests expose a session-expiry defect missed by the aging dataset.

Explanation

Correct Answer

B:

This is the expected verification outcome: Newly introduced rounding boundary failures become visible in test results before release. It directly checks the corrective activity (Analyze the changed rules and select new negative, boundary, and exception tests appropriate to the change.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A delivery-app tester executes scripted checks but does not record the expected result for a promotional fee calculation, so a different fee is accepted as correct. It does not establish the required result for this case: Newly introduced rounding boundary failures become visible in test results before release.

C:

This result may validate another testing scenario: A team runs an API security test that unexpectedly deletes a staging account, then argues that any test causing impact is inherently unsuccessful. It does not establish the required result for this case: Newly introduced rounding boundary failures become visible in test results before release.

D:

This result may validate another testing scenario: An online examination team runs the identical dataset every sprint and sees fewer new findings, treating this as proof the application has become defect free. It does not establish the required result for this case: Newly introduced rounding boundary failures become visible in test results before release.