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Exam Code: CTFL v4.0

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

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ISTQB CTFL v4.0 Practice Test 91

Question 900

A test analyst investigates the following quality concern: An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Baseline requirements and their tests together for major release evidence.
  2. Automate environment manifests and check them before each significant run.
  3. Reconcile release reports with the current defect register independently of ownership.
  4. Store fixtures under reviewable version control and isolate execution environments.

Explanation

Correct Answer

D:

This safeguard specifically targets the contributing cause: Store fixtures under reviewable version control and isolate execution environments. It addresses the principle (Configuration management controls testware changes and prevents hidden shared-state interference.) and can be assessed by: Both runs use stable declared fixtures and no longer influence one another.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 5.4): A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. The targeted safeguard for the current case is: Store fixtures under reviewable version control and isolate execution environments.

B:

This preventive step mitigates a different project risk (syllabus section 5.4): A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. The targeted safeguard for the current case is: Store fixtures under reviewable version control and isolate execution environments.

C:

This preventive step mitigates a different project risk (syllabus section 5.5): A release board considers a known authorization bypass as an open defect but the test lead hides it from the completion report because it is assigned to another department. The targeted safeguard for the current case is: Store fixtures under reviewable version control and isolate execution environments.

Question 901

In a fictional application-delivery project, the team reports: A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. Which testing activity or corrective action best addresses this situation?

  1. Apply configuration control and change impact links to the affected testware.
  2. Link the result to the exact version of the requirement and expected behavior.
  3. Use configuration management to uniquely identify test objects, environments, data and relevant versions.
  4. Apply agreed entry criteria for a stable build, dependencies, data and environment readiness.

Explanation

Correct Answer

B:

The targeted action is: Link the result to the exact version of the requirement and expected behavior. It addresses the underlying software-testing principle: Traceability without configuration version may be insufficient to reproduce a test oracle. The relevant confirming evidence is: Reviewers can explain why an older test passed and a later one required a different limit.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): A release candidate has many test suites but nobody tracks which tests were updated after an API contract was changed, so old validations are used in the final report. The present problem instead depends on: Traceability without configuration version may be insufficient to reproduce a test oracle.

C:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): A security regression fails after a deployment and the tester cannot identify which application build or rule file was tested because artifact names are reused. The present problem instead depends on: Traceability without configuration version may be insufficient to reproduce a test oracle.

D:

This choice is a useful response to a different testing situation (section 5.1, Test Planning): An integration group begins formal testing while the authentication environment is unavailable and a critical database schema is still changing. The present problem instead depends on: Traceability without configuration version may be insufficient to reproduce a test oracle.

Question 902

In a fictional application-delivery project, the team reports: A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. Which observation best verifies that the stated testing issue is addressed?

  1. Both runs use stable declared fixtures and no longer influence one another.
  2. Both teams reproduce the expected outcome when using the same configuration.
  3. Reviewers can explain why an older test passed and a later one required a different limit.
  4. The weighted estimate is 5.5 days with its formula and assumptions documented.

Explanation

Correct Answer

C:

This is the expected verification outcome: Reviewers can explain why an older test passed and a later one required a different limit. It directly checks the corrective activity (Link the result to the exact version of the requirement and expected behavior.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results. It does not establish the required result for this case: Reviewers can explain why an older test passed and a later one required a different limit.

B:

This result may validate another testing scenario: A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. It does not establish the required result for this case: Reviewers can explain why an older test passed and a later one required a different limit.

D:

This result may validate another testing scenario: A project manager uses a three-point estimate optimistic 2 days, most likely 5 days, pessimistic 11 days, but reports a simple arithmetic mean without stating the chosen formula. It does not establish the required result for this case: Reviewers can explain why an older test passed and a later one required a different limit.

Question 903

In a fictional application-delivery project, the team reports: A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. Which testing concept or underlying cause best explains the reported problem?

  1. Version and configuration differences can explain apparent inconsistencies in testing outcomes.
  2. Reproducible testing requires control of identified configuration items and baselines.
  3. Traceability without configuration version may be insufficient to reproduce a test oracle.
  4. Confirmation testing does not eliminate the need to manage adverse side effects as separate defects.

Explanation

Correct Answer

C:

The most relevant explanation is: Traceability without configuration version may be insufficient to reproduce a test oracle. This describes why the original situation (A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs.) merits the response: Link the result to the exact version of the requirement and expected behavior.

Incorrect Answers

A:

This principle could explain a different testing issue: A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. The present case is better explained by: Traceability without configuration version may be insufficient to reproduce a test oracle.

B:

This principle could explain a different testing issue: A security regression fails after a deployment and the tester cannot identify which application build or rule file was tested because artifact names are reused. The present case is better explained by: Traceability without configuration version may be insufficient to reproduce a test oracle.

D:

This principle could explain a different testing issue: An integration defect passes retest, but related tests expose a new API schema regression and the manager closes all work as one fixed issue. The present case is better explained by: Traceability without configuration version may be insufficient to reproduce a test oracle.

Question 904

In a fictional application-delivery project, the team reports: A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Automate environment manifests and check them before each significant run.
  2. Include feature flags and build hashes in defect evidence.
  3. Baseline requirements and their tests together for major release evidence.
  4. Review risk categories and dependencies during staffing changes.

Explanation

Correct Answer

C:

This safeguard specifically targets the contributing cause: Baseline requirements and their tests together for major release evidence. It addresses the principle (Traceability without configuration version may be insufficient to reproduce a test oracle.) and can be assessed by: Reviewers can explain why an older test passed and a later one required a different limit.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 5.4): A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. The targeted safeguard for the current case is: Baseline requirements and their tests together for major release evidence.

B:

This preventive step mitigates a different project risk (syllabus section 5.4): A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. The targeted safeguard for the current case is: Baseline requirements and their tests together for major release evidence.

D:

This preventive step mitigates a different project risk (syllabus section 5.2): An integration project discovers that the only test database administrator is leaving, but the planning team describes this as a direct customer data-corruption defect. The targeted safeguard for the current case is: Baseline requirements and their tests together for major release evidence.

Question 905

A tester is asked to evaluate the following situation: A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. Which testing activity or corrective action best addresses this situation?

  1. Use configuration management to uniquely identify test objects, environments, data and relevant versions.
  2. Link the result to the exact version of the requirement and expected behavior.
  3. Record and manage an environment configuration baseline alongside product and test versions.
  4. Include the likelihood and impact of latent product risks when prioritizing tests.

Explanation

Correct Answer

C:

The targeted action is: Record and manage an environment configuration baseline alongside product and test versions. It addresses the underlying software-testing principle: Test environment state is part of test configuration needed for reliable comparisons. The relevant confirming evidence is: The environment is rebuilt with the intended schema and settings and original failures can be reproduced.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): A security regression fails after a deployment and the tester cannot identify which application build or rule file was tested because artifact names are reused. The present problem instead depends on: Test environment state is part of test configuration needed for reliable comparisons.

B:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. The present problem instead depends on: Test environment state is part of test configuration needed for reliable comparisons.

D:

This choice is a useful response to a different testing situation (section 5.1, Test Planning): A tester ranks cases solely by customer visibility and leaves a severe hidden data-integrity risk until the final day. The present problem instead depends on: Test environment state is part of test configuration needed for reliable comparisons.

Question 906

A tester is asked to evaluate the following situation: A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. Which observation best verifies that the stated testing issue is addressed?

  1. Both teams reproduce the expected outcome when using the same configuration.
  2. Both runs use stable declared fixtures and no longer influence one another.
  3. The report corrects false passes and exposes any actual behavior failures.
  4. The environment is rebuilt with the intended schema and settings and original failures can be reproduced.

Explanation

Correct Answer

D:

This is the expected verification outcome: The environment is rebuilt with the intended schema and settings and original failures can be reproduced. It directly checks the corrective activity (Record and manage an environment configuration baseline alongside product and test versions.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. It does not establish the required result for this case: The environment is rebuilt with the intended schema and settings and original failures can be reproduced.

B:

This result may validate another testing scenario: An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results. It does not establish the required result for this case: The environment is rebuilt with the intended schema and settings and original failures can be reproduced.

C:

This result may validate another testing scenario: A project tracks all test cases as passed but the execution log shows several scripts silently skipped all assertions during a framework upgrade. It does not establish the required result for this case: The environment is rebuilt with the intended schema and settings and original failures can be reproduced.

Question 907

A tester is asked to evaluate the following situation: A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. Which testing concept or underlying cause best explains the reported problem?

  1. Test environment state is part of test configuration needed for reliable comparisons.
  2. Traceability without configuration version may be insufficient to reproduce a test oracle.
  3. Version and configuration differences can explain apparent inconsistencies in testing outcomes.
  4. Counting cases alone is an unreliable predictor of testing effort across unlike environments.

Explanation

Correct Answer

A:

The most relevant explanation is: Test environment state is part of test configuration needed for reliable comparisons. This describes why the original situation (A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration.) merits the response: Record and manage an environment configuration baseline alongside product and test versions.

Incorrect Answers

B:

This principle could explain a different testing issue: A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. The present case is better explained by: Test environment state is part of test configuration needed for reliable comparisons.

C:

This principle could explain a different testing issue: A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. The present case is better explained by: Test environment state is part of test configuration needed for reliable comparisons.

D:

This principle could explain a different testing issue: A quality lead assumes the same count of test cases means identical effort across a simple API and a complex hardware integration system. The present case is better explained by: Test environment state is part of test configuration needed for reliable comparisons.

Question 908

A tester is asked to evaluate the following situation: A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Automate environment manifests and check them before each significant run.
  2. Store fixtures under reviewable version control and isolate execution environments.
  3. Record immutable build and testware identifiers with execution results.
  4. Define report purpose and recipient requirements before choosing detail level.

Explanation

Correct Answer

A:

This safeguard specifically targets the contributing cause: Automate environment manifests and check them before each significant run. It addresses the principle (Test environment state is part of test configuration needed for reliable comparisons.) and can be assessed by: The environment is rebuilt with the intended schema and settings and original failures can be reproduced.

Incorrect Answers

B:

This preventive step mitigates a different project risk (syllabus section 5.4): An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results. The targeted safeguard for the current case is: Automate environment manifests and check them before each significant run.

C:

This preventive step mitigates a different project risk (syllabus section 5.4): A security regression fails after a deployment and the tester cannot identify which application build or rule file was tested because artifact names are reused. The targeted safeguard for the current case is: Automate environment manifests and check them before each significant run.

D:

This preventive step mitigates a different project risk (syllabus section 5.3): A delivery manager receives an identical technical log dump and high-level executive report despite the two audiences needing different decisions. The targeted safeguard for the current case is: Automate environment manifests and check them before each significant run.

Question 909

A quality engineering exercise presents this condition: A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. Which testing activity or corrective action best addresses this situation?

  1. Compare environment and software baselines, including feature flags, before interpreting the discrepant results.
  2. Version and isolate test-data configurations per branch or test run.
  3. Link the result to the exact version of the requirement and expected behavior.
  4. Set up timely escalation for critical trends and use periodic summaries for routine status.

Explanation

Correct Answer

A:

The targeted action is: Compare environment and software baselines, including feature flags, before interpreting the discrepant results. It addresses the underlying software-testing principle: Version and configuration differences can explain apparent inconsistencies in testing outcomes. The relevant confirming evidence is: Both teams reproduce the expected outcome when using the same configuration.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results. The present problem instead depends on: Version and configuration differences can explain apparent inconsistencies in testing outcomes.

C:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. The present problem instead depends on: Version and configuration differences can explain apparent inconsistencies in testing outcomes.

D:

This choice is a useful response to a different testing situation (section 5.3, Test Monitoring, Test Control and Test Completion): A tester sends all defect details in a single long daily status email while operations needs an immediate signal when payment failures exceed an agreed threshold. The present problem instead depends on: Version and configuration differences can explain apparent inconsistencies in testing outcomes.

Question 910

A quality engineering exercise presents this condition: A defect retest passes in a developer workspace but fails in QA, and the team assumes one tester must be wrong without comparing builds or feature flags. Which observation best verifies that the stated testing issue is addressed?

  1. A failed run can be reproduced with the same code, rules and test configuration.
  2. Both teams reproduce the expected outcome when using the same configuration.
  3. The report names the current test versions and clearly excludes obsolete results.
  4. Another engineer reproduces the crash in the stated build and can investigate it.

Explanation

Correct Answer

B:

This is the expected verification outcome: Both teams reproduce the expected outcome when using the same configuration. It directly checks the corrective activity (Compare environment and software baselines, including feature flags, before interpreting the discrepant results.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A security regression fails after a deployment and the tester cannot identify which application build or rule file was tested because artifact names are reused. It does not establish the required result for this case: Both teams reproduce the expected outcome when using the same configuration.

C:

This result may validate another testing scenario: A release candidate has many test suites but nobody tracks which tests were updated after an API contract was changed, so old validations are used in the final report. It does not establish the required result for this case: Both teams reproduce the expected outcome when using the same configuration.

D:

This result may validate another testing scenario: A mobile app tester files a defect with title 'does not work', no expected outcome, and no steps, preventing a developer from reproducing it. It does not establish the required result for this case: Both teams reproduce the expected outcome when using the same configuration.