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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 90

Question 890

A software testing team encounters the following project situation: A testing team claims a 30% fall in defect counts means the current release is safer, although half the planned tests were deferred. Which observation best verifies that the stated testing issue is addressed?

  1. The updated report identifies obsolete checks and new coverage obligations.
  2. The report corrects false passes and exposes any actual behavior failures.
  3. The release report states reduced test exposure and withholds an unsupported improvement claim.
  4. A developer reproduces the exact incorrect total from the defect report.

Explanation

Correct Answer

C:

This is the expected verification outcome: The release report states reduced test exposure and withholds an unsupported improvement claim. It directly checks the corrective activity (Normalize defect observations against executed scope and coverage before interpreting the trend.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: An agile team changes a feature's acceptance rules mid-sprint but never updates the test status report, so completed tests still refer to the previous behavior. It does not establish the required result for this case: The release report states reduced test exposure and withholds an unsupported improvement claim.

B:

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 release report states reduced test exposure and withholds an unsupported improvement claim.

D:

This result may validate another testing scenario: A reporting test detects an incorrect decimal total, but the defect tracker records only a UI screenshot without the input data or rule being applied. It does not establish the required result for this case: The release report states reduced test exposure and withholds an unsupported improvement claim.

Question 891

A software testing team encounters the following project situation: A testing team claims a 30% fall in defect counts means the current release is safer, although half the planned tests were deferred. Which testing concept or underlying cause best explains the reported problem?

  1. Calendar completion is not equivalent to achieving release test objectives and exit conditions.
  2. Test monitoring depends on trustworthy execution evidence, not merely a tool-generated success label.
  3. Lower observed defect numbers may result from less testing rather than better software.
  4. Risk identification and control must be revisited as the product and context evolve.

Explanation

Correct Answer

C:

The most relevant explanation is: Lower observed defect numbers may result from less testing rather than better software. This describes why the original situation (A testing team claims a 30% fall in defect counts means the current release is safer, although half the planned tests were deferred.) merits the response: Normalize defect observations against executed scope and coverage before interpreting the trend.

Incorrect Answers

A:

This principle could explain a different testing issue: A system integration suite reaches the time budget with ten unexecuted high-risk cases, but management closes testing because the planned deadline was reached. The present case is better explained by: Lower observed defect numbers may result from less testing rather than better software.

B:

This principle could explain a different testing issue: A project tracks all test cases as passed but the execution log shows several scripts silently skipped all assertions during a framework upgrade. The present case is better explained by: Lower observed defect numbers may result from less testing rather than better software.

D:

This principle could explain a different testing issue: A feature has been redesigned, but the risk register still describes its old external billing interface and no one reviews the stale mitigation plan. The present case is better explained by: Lower observed defect numbers may result from less testing rather than better software.

Question 892

A software testing team encounters the following project situation: A testing team claims a 30% fall in defect counts means the current release is safer, although half the planned tests were deferred. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Define escalation and response thresholds for serious test findings.
  2. Define threshold-based escalation and reporting schedules with stakeholders.
  3. Explain scope and effort changes alongside defect trends.
  4. Document estimation drivers when expert estimates diverge widely.

Explanation

Correct Answer

C:

This safeguard specifically targets the contributing cause: Explain scope and effort changes alongside defect trends. It addresses the principle (Lower observed defect numbers may result from less testing rather than better software.) and can be assessed by: The release report states reduced test exposure and withholds an unsupported improvement claim.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 5.3): A test team reports only 'green' after a critical data mismatch emerges but no one updates the plan or triggers investigation. The targeted safeguard for the current case is: Explain scope and effort changes alongside defect trends.

B:

This preventive step mitigates a different project risk (syllabus section 5.3): 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 targeted safeguard for the current case is: Explain scope and effort changes alongside defect trends.

D:

This preventive step mitigates a different project risk (syllabus section 5.1): Three experienced testers estimate a migration test effort as 4, 8 and 16 days, and the manager silently selects four days to satisfy a deadline. The targeted safeguard for the current case is: Explain scope and effort changes alongside defect trends.

Question 893

During a release-readiness review, a tester observes: 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. Which testing activity or corrective action best addresses this situation?

  1. Record and manage an environment configuration baseline alongside product and test versions.
  2. Apply configuration control and change impact links to the affected testware.
  3. Reassess test basis and status, documenting which earlier results remain valid.
  4. Use configuration management to uniquely identify test objects, environments, data and relevant versions.

Explanation

Correct Answer

D:

The targeted action is: Use configuration management to uniquely identify test objects, environments, data and relevant versions. It addresses the underlying software-testing principle: Reproducible testing requires control of identified configuration items and baselines. The relevant confirming evidence is: A failed run can be reproduced with the same code, rules and test configuration.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 5.4, Configuration Management): 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 present problem instead depends on: Reproducible testing requires control of identified configuration items and baselines.

B:

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: Reproducible testing requires control of identified configuration items and baselines.

C:

This choice is a useful response to a different testing situation (section 5.3, Test Monitoring, Test Control and Test Completion): An agile team changes a feature's acceptance rules mid-sprint but never updates the test status report, so completed tests still refer to the previous behavior. The present problem instead depends on: Reproducible testing requires control of identified configuration items and baselines.

Question 894

During a release-readiness review, a tester observes: 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. 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. The environment is rebuilt with the intended schema and settings and original failures can be reproduced.
  3. Both runs use stable declared fixtures and no longer influence one another.
  4. The recorded estimate includes integration risks and clarifies the conditions leading to disagreement.

Explanation

Correct Answer

A:

This is the expected verification outcome: A failed run can be reproduced with the same code, rules and test configuration. It directly checks the corrective activity (Use configuration management to uniquely identify test objects, environments, data and relevant versions.) for the described testing problem.

Incorrect Answers

B:

This result may validate another testing scenario: A bank restores a failed staging environment from a snapshot but cannot determine which database schema, service version and configuration were present before restoration. It does not establish the required result for this case: A failed run can be reproduced with the same code, rules and test configuration.

C:

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: A failed run can be reproduced with the same code, rules and test configuration.

D:

This result may validate another testing scenario: Three experienced testers estimate a migration test effort as 4, 8 and 16 days, and the manager silently selects four days to satisfy a deadline. It does not establish the required result for this case: A failed run can be reproduced with the same code, rules and test configuration.

Question 895

During a release-readiness review, a tester observes: 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. Which testing concept or underlying cause best explains the reported problem?

  1. Configuration management controls testware changes and prevents hidden shared-state interference.
  2. Test environment state is part of test configuration needed for reliable comparisons.
  3. Negative tool findings cannot reduce risk for areas the tool did not examine.
  4. Reproducible testing requires control of identified configuration items and baselines.

Explanation

Correct Answer

D:

The most relevant explanation is: Reproducible testing requires control of identified configuration items and baselines. This describes why the original situation (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.) merits the response: Use configuration management to uniquely identify test objects, environments, data and relevant versions.

Incorrect Answers

A:

This principle could explain a different testing issue: An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results. The present case is better explained by: Reproducible testing requires control of identified configuration items and baselines.

B:

This principle could explain a different testing issue: 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 present case is better explained by: Reproducible testing requires control of identified configuration items and baselines.

C:

This principle could explain a different testing issue: A team runs a penetration scanner and marks all identified security risks eliminated because the tool reported no findings, though its scan excluded authenticated endpoints. The present case is better explained by: Reproducible testing requires control of identified configuration items and baselines.

Question 896

During a release-readiness review, a tester observes: 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. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Include feature flags and build hashes in defect evidence.
  2. Record immutable build and testware identifiers with execution results.
  3. Review affected test cases and scripts with each contract revision.
  4. Include test-data and expected-result references in numerical defect reports.

Explanation

Correct Answer

B:

This safeguard specifically targets the contributing cause: Record immutable build and testware identifiers with execution results. It addresses the principle (Reproducible testing requires control of identified configuration items and baselines.) and can be assessed by: A failed run can be reproduced with the same code, rules and test configuration.

Incorrect Answers

A:

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: Record immutable build and testware identifiers with execution results.

C:

This preventive step mitigates a different project risk (syllabus section 5.4): 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 targeted safeguard for the current case is: Record immutable build and testware identifiers with execution results.

D:

This preventive step mitigates a different project risk (syllabus section 5.5): A reporting test detects an incorrect decimal total, but the defect tracker records only a UI screenshot without the input data or rule being applied. The targeted safeguard for the current case is: Record immutable build and testware identifiers with execution results.

Question 897

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 testing activity or corrective action best addresses this situation?

  1. Version and isolate test-data configurations per branch or test run.
  2. Apply configuration control and change impact links to the affected testware.
  3. Link the result to the exact version of the requirement and expected behavior.
  4. Tailor technical failure details for engineers and concise risk/status information for executives.

Explanation

Correct Answer

A:

The targeted action is: Version and isolate test-data configurations per branch or test run. It addresses the underlying software-testing principle: Configuration management controls testware changes and prevents hidden shared-state interference. The relevant confirming evidence is: Both runs use stable declared fixtures and no longer influence one another.

Incorrect Answers

B:

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: Configuration management controls testware changes and prevents hidden shared-state interference.

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: Configuration management controls testware changes and prevents hidden shared-state interference.

D:

This choice is a useful response to a different testing situation (section 5.3, Test Monitoring, Test Control and Test Completion): A delivery manager receives an identical technical log dump and high-level executive report despite the two audiences needing different decisions. The present problem instead depends on: Configuration management controls testware changes and prevents hidden shared-state interference.

Question 898

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 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. Reviewers can explain why an older test passed and a later one required a different limit.
  4. Patient-safety behaviors receive stronger validation than low-impact presentation details.

Explanation

Correct Answer

B:

This is the expected verification outcome: Both runs use stable declared fixtures and no longer influence one another. It directly checks the corrective activity (Version and isolate test-data configurations per branch or test run.) 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: Both runs use stable declared fixtures and no longer influence one another.

C:

This result may validate another testing scenario: A test report references an approved requirement ID but not the revision, even though the requirement changed its threshold between test runs. It does not establish the required result for this case: Both runs use stable declared fixtures and no longer influence one another.

D:

This result may validate another testing scenario: A manager insists all risks with the same likelihood score deserve identical test effort even though one affects only a minor label and the other affects patient safety. It does not establish the required result for this case: Both runs use stable declared fixtures and no longer influence one another.

Question 899

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 testing concept or underlying cause best explains the reported problem?

  1. Configuration management controls testware changes and prevents hidden shared-state interference.
  2. Traceability without configuration version may be insufficient to reproduce a test oracle.
  3. Test environment state is part of test configuration needed for reliable comparisons.
  4. Accurate test monitoring must track changes to the scope and validity of completed evidence.

Explanation

Correct Answer

A:

The most relevant explanation is: Configuration management controls testware changes and prevents hidden shared-state interference. This describes why the original situation (An automation team changes test-data fixtures in a shared folder while two branches run parallel regression suites, causing nondeterministic results.) merits the response: Version and isolate test-data configurations per branch or test run.

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: Configuration management controls testware changes and prevents hidden shared-state interference.

C:

This principle could explain a different testing issue: 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 present case is better explained by: Configuration management controls testware changes and prevents hidden shared-state interference.

D:

This principle could explain a different testing issue: An agile team changes a feature's acceptance rules mid-sprint but never updates the test status report, so completed tests still refer to the previous behavior. The present case is better explained by: Configuration management controls testware changes and prevents hidden shared-state interference.

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.