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Exam Code: CTFL v4.0

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

Certification Provider: ISTQB

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ISTQB CTFL v4.0 Practice Test 35

Question 340

A software testing team encounters the following project situation: A point-of-sale app has an emergency hotfix for a crash, and release engineers validate only that startup succeeds while omitting the fixed crash path. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Preserve each defect's reproducing test and maintain an impact-based smoke set.
  2. Trace infrastructure changes to dependent business rules and associated regression cases.
  3. Include downstream consumer compatibility in maintenance change reviews.
  4. Derive acceptance scenarios from real users and business processes.

Explanation

Correct Answer

A:

This safeguard specifically targets the contributing cause: Preserve each defect's reproducing test and maintain an impact-based smoke set. It addresses the principle (Corrective maintenance changes require evidence of the fix and of avoiding harmful side effects.) and can be assessed by: The original reproduction no longer crashes and nearby checkout initialization still works.

Incorrect Answers

B:

This preventive step mitigates a different project risk (syllabus section 2.3): A tax application migrates tax rules to a newer runtime and the test team tests only newly added features, ignoring old filings that may now calculate differently. The targeted safeguard for the current case is: Preserve each defect's reproducing test and maintain an impact-based smoke set.

C:

This preventive step mitigates a different project risk (syllabus section 2.3): An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. The targeted safeguard for the current case is: Preserve each defect's reproducing test and maintain an impact-based smoke set.

D:

This preventive step mitigates a different project risk (syllabus section 2.2): A hospital conducts acceptance testing with only the development team's synthetic workflow, and actual clinicians find no provision for emergency priority overrides. The targeted safeguard for the current case is: Preserve each defect's reproducing test and maintain an impact-based smoke set.

Question 341

During a release-readiness review, a tester observes: A public portal is moved from one cloud region to another without code changes and fails because the new region lacks a required message queue. Which testing activity or corrective action best addresses this situation?

  1. Test critical workflows in the new operational environment before declaring migration complete.
  2. Verify transitional behavior and dependent consumer migration under the deprecation plan.
  3. Use change-impact analysis to retest existing tax calculations affected by the runtime migration.
  4. Measure internal branch or statement coverage with a white-box instrumented test suite.

Explanation

Correct Answer

A:

The targeted action is: Test critical workflows in the new operational environment before declaring migration complete. It addresses the underlying software-testing principle: Environmental platform migration can break an otherwise unchanged application. The relevant confirming evidence is: A representative submission creates and consumes the expected message in the new region.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 2.3, Maintenance Testing): An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. The present problem instead depends on: Environmental platform migration can break an otherwise unchanged application.

C:

This choice is a useful response to a different testing situation (section 2.3, Maintenance Testing): A tax application migrates tax rules to a newer runtime and the test team tests only newly added features, ignoring old filings that may now calculate differently. The present problem instead depends on: Environmental platform migration can break an otherwise unchanged application.

D:

This choice is a useful response to a different testing situation (section 2.2, Test Levels and Test Types): A mobile app team uses a black-box login test to claim every internal conditional branch has executed because the screen looked correct. The present problem instead depends on: Environmental platform migration can break an otherwise unchanged application.

Question 342

During a release-readiness review, a tester observes: A public portal is moved from one cloud region to another without code changes and fails because the new region lacks a required message queue. Which observation best verifies that the stated testing issue is addressed?

  1. A representative submission creates and consumes the expected message in the new region.
  2. Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.
  3. Sampled records match source data and authorized auditors can retrieve the archive.
  4. The misunderstood workflow is corrected before a large suite encodes the wrong oracle.

Explanation

Correct Answer

A:

This is the expected verification outcome: A representative submission creates and consumes the expected message in the new region. It directly checks the corrective activity (Test critical workflows in the new operational environment before declaring migration complete.) for the described testing problem.

Incorrect Answers

B:

This result may validate another testing scenario: An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. It does not establish the required result for this case: A representative submission creates and consumes the expected message in the new region.

C:

This result may validate another testing scenario: An ERP is partially retired and a data export process is introduced, but test planning excludes archival integrity because no new user interface was built. It does not establish the required result for this case: A representative submission creates and consumes the expected message in the new region.

D:

This result may validate another testing scenario: A company uses nightly scripted browser tests but never reviews requirements, so everyone repeatedly automates checks for a misunderstood customer workflow. It does not establish the required result for this case: A representative submission creates and consumes the expected message in the new region.

Question 343

During a release-readiness review, a tester observes: A public portal is moved from one cloud region to another without code changes and fails because the new region lacks a required message queue. Which testing concept or underlying cause best explains the reported problem?

  1. Maintenance changes can propagate risk into external systems connected to the modified interface.
  2. Retirement and migration activities may require testing even when new functionality is not delivered.
  3. Delivery performance and tested product quality are related but distinct dimensions of an SDLC.
  4. Environmental platform migration can break an otherwise unchanged application.

Explanation

Correct Answer

D:

The most relevant explanation is: Environmental platform migration can break an otherwise unchanged application. This describes why the original situation (A public portal is moved from one cloud region to another without code changes and fails because the new region lacks a required message queue.) merits the response: Test critical workflows in the new operational environment before declaring migration complete.

Incorrect Answers

A:

This principle could explain a different testing issue: An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. The present case is better explained by: Environmental platform migration can break an otherwise unchanged application.

B:

This principle could explain a different testing issue: An ERP is partially retired and a data export process is introduced, but test planning excludes archival integrity because no new user interface was built. The present case is better explained by: Environmental platform migration can break an otherwise unchanged application.

C:

This principle could explain a different testing issue: An organization assesses software testing success by deployment frequency alone, with no indicator of escaped high-severity failures after releases. The present case is better explained by: Environmental platform migration can break an otherwise unchanged application.

Question 344

During a release-readiness review, a tester observes: A public portal is moved from one cloud region to another without code changes and fails because the new region lacks a required message queue. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Include data migration and decommissioning risks in maintenance test plans.
  2. Preserve each defect's reproducing test and maintain an impact-based smoke set.
  3. Test critical data representation boundaries before full system release.
  4. Review integration dependencies and configuration drift during maintenance relocation.

Explanation

Correct Answer

D:

This safeguard specifically targets the contributing cause: Review integration dependencies and configuration drift during maintenance relocation. It addresses the principle (Environmental platform migration can break an otherwise unchanged application.) and can be assessed by: A representative submission creates and consumes the expected message in the new region.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 2.3): An ERP is partially retired and a data export process is introduced, but test planning excludes archival integrity because no new user interface was built. The targeted safeguard for the current case is: Review integration dependencies and configuration drift during maintenance relocation.

B:

This preventive step mitigates a different project risk (syllabus section 2.3): A point-of-sale app has an emergency hotfix for a crash, and release engineers validate only that startup succeeds while omitting the fixed crash path. The targeted safeguard for the current case is: Review integration dependencies and configuration drift during maintenance relocation.

C:

This preventive step mitigates a different project risk (syllabus section 2.2): A new tax calculation component returns correct totals to its local unit tests but yields different rounding when invoked through the API currency serialization layer. The targeted safeguard for the current case is: Review integration dependencies and configuration drift during maintenance relocation.

Question 345

A test analyst investigates the following quality concern: An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. Which testing activity or corrective action best addresses this situation?

  1. Use change-impact analysis to retest existing tax calculations affected by the runtime migration.
  2. Verify transitional behavior and dependent consumer migration under the deprecation plan.
  3. Execute confirmation testing for the original crash and selected regression checks for related startup flows.
  4. Integrate test design and execution within each iteration and meet an agreed definition of done.

Explanation

Correct Answer

B:

The targeted action is: Verify transitional behavior and dependent consumer migration under the deprecation plan. It addresses the underlying software-testing principle: Maintenance changes can propagate risk into external systems connected to the modified interface. The relevant confirming evidence is: Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 2.3, Maintenance Testing): A tax application migrates tax rules to a newer runtime and the test team tests only newly added features, ignoring old filings that may now calculate differently. The present problem instead depends on: Maintenance changes can propagate risk into external systems connected to the modified interface.

C:

This choice is a useful response to a different testing situation (section 2.3, Maintenance Testing): A point-of-sale app has an emergency hotfix for a crash, and release engineers validate only that startup succeeds while omitting the fixed crash path. The present problem instead depends on: Maintenance changes can propagate risk into external systems connected to the modified interface.

D:

This choice is a useful response to a different testing situation (section 2.1, Testing in the Context of a Software Development Lifecycle (SDLC)): An agile team finishes coding stories during a sprint but schedules all functional tests into a distant stabilization sprint, delaying discovery of regressions. The present problem instead depends on: Maintenance changes can propagate risk into external systems connected to the modified interface.

Question 346

A test analyst investigates the following quality concern: An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. Which observation best verifies that the stated testing issue is addressed?

  1. A representative submission creates and consumes the expected message in the new region.
  2. Currency symbols and numeric totals meet requirements while unrelated components are appropriately sampled.
  3. Coverage instrumentation identifies unexecuted error-handling branches despite a successful login.
  4. Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.

Explanation

Correct Answer

D:

This is the expected verification outcome: Supported clients use the replacement endpoint and obsolete calls fail in the documented manner. It directly checks the corrective activity (Verify transitional behavior and dependent consumer migration under the deprecation plan.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A public portal is moved from one cloud region to another without code changes and fails because the new region lacks a required message queue. It does not establish the required result for this case: Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.

B:

This result may validate another testing scenario: A vendor adds a minor currency symbol to a financial report and runs every historical system test without considering the low-risk scope or changed reporting output. It does not establish the required result for this case: Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.

C:

This result may validate another testing scenario: A mobile app team uses a black-box login test to claim every internal conditional branch has executed because the screen looked correct. It does not establish the required result for this case: Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.

Question 347

A test analyst investigates the following quality concern: An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. Which testing concept or underlying cause best explains the reported problem?

  1. Maintenance changes can propagate risk into external systems connected to the modified interface.
  2. Corrective maintenance changes require evidence of the fix and of avoiding harmful side effects.
  3. Maintenance testing addresses regression risk from changes to existing systems and environments.
  4. Fast delivery without proportionate quality feedback can propagate defects repeatedly through releases.

Explanation

Correct Answer

A:

The most relevant explanation is: Maintenance changes can propagate risk into external systems connected to the modified interface. This describes why the original situation (An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation.) merits the response: Verify transitional behavior and dependent consumer migration under the deprecation plan.

Incorrect Answers

B:

This principle could explain a different testing issue: A point-of-sale app has an emergency hotfix for a crash, and release engineers validate only that startup succeeds while omitting the fixed crash path. The present case is better explained by: Maintenance changes can propagate risk into external systems connected to the modified interface.

C:

This principle could explain a different testing issue: A tax application migrates tax rules to a newer runtime and the test team tests only newly added features, ignoring old filings that may now calculate differently. The present case is better explained by: Maintenance changes can propagate risk into external systems connected to the modified interface.

D:

This principle could explain a different testing issue: A software team changes continuous deployment to daily releases but keeps a six-week feedback cycle for defects found in user acceptance testing. The present case is better explained by: Maintenance changes can propagate risk into external systems connected to the modified interface.

Question 348

A test analyst investigates the following quality concern: An API provider deprecates an endpoint, but clients continue using it because the maintenance team tests only the provider's new implementation. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Preserve each defect's reproducing test and maintain an impact-based smoke set.
  2. Maintain a practical change-impact matrix for regression selection.
  3. Link validation activities to the lifecycle artifacts that provide their test basis.
  4. Include downstream consumer compatibility in maintenance change reviews.

Explanation

Correct Answer

D:

This safeguard specifically targets the contributing cause: Include downstream consumer compatibility in maintenance change reviews. It addresses the principle (Maintenance changes can propagate risk into external systems connected to the modified interface.) and can be assessed by: Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 2.3): A point-of-sale app has an emergency hotfix for a crash, and release engineers validate only that startup succeeds while omitting the fixed crash path. The targeted safeguard for the current case is: Include downstream consumer compatibility in maintenance change reviews.

B:

This preventive step mitigates a different project risk (syllabus section 2.3): A vendor adds a minor currency symbol to a financial report and runs every historical system test without considering the low-risk scope or changed reporting output. The targeted safeguard for the current case is: Include downstream consumer compatibility in maintenance change reviews.

C:

This preventive step mitigates a different project risk (syllabus section 2.1): A designer claims the V-model prohibits all iterative feedback and cannot support early test planning because diagrams put testing boxes after coding. The targeted safeguard for the current case is: Include downstream consumer compatibility in maintenance change reviews.

Question 349

In a fictional application-delivery project, the team reports: A medical booking team waits until executable code exists to examine a requirement that says 'fast appointment confirmation', leaving the performance target ambiguous. Which testing activity or corrective action best addresses this situation?

  1. Triage tool findings as potential defects and validate severity and impact using context or dynamic evidence where needed.
  2. Review the requirement statically and request a measurable confirmation-time threshold before coding.
  3. Supplement static reasoning with dynamic input-boundary execution under realistic numeric values.
  4. Apply defined completion criteria and track unresolved defects for further action before approving the artifact.

Explanation

Correct Answer

B:

The targeted action is: Review the requirement statically and request a measurable confirmation-time threshold before coding. It addresses the underlying software-testing principle: Static testing can find ambiguity in non-executable work products without running software. The relevant confirming evidence is: A revised statement defines the response-time limit and supports precise performance tests.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 3.1, Static Testing Basics): A developer uses a static source-code analyzer and assumes every reported issue proves the application will fail when executed. The present problem instead depends on: Static testing can find ambiguity in non-executable work products without running software.

C:

This choice is a useful response to a different testing situation (section 3.1, Static Testing Basics): A mobile banking team relies on a peer review to confirm fee arithmetic but never runs boundary tests for integer overflow. The present problem instead depends on: Static testing can find ambiguity in non-executable work products without running software.

D:

This choice is a useful response to a different testing situation (section 3.2, Feedback and Review Process): A moderator closes a formal review because time is up although several blocking defects remain unresolved and no exit rule exists. The present problem instead depends on: Static testing can find ambiguity in non-executable work products without running software.

Question 350

In a fictional application-delivery project, the team reports: A medical booking team waits until executable code exists to examine a requirement that says 'fast appointment confirmation', leaving the performance target ambiguous. Which observation best verifies that the stated testing issue is addressed?

  1. The dashboard labels lint checks and executed code coverage with their proper sources.
  2. Confirmed issues are distinguished from false positives and informational warnings.
  3. Findings and follow-up are documented by distinct participants under the agreed inspection process.
  4. A revised statement defines the response-time limit and supports precise performance tests.

Explanation

Correct Answer

D:

This is the expected verification outcome: A revised statement defines the response-time limit and supports precise performance tests. It directly checks the corrective activity (Review the requirement statically and request a measurable confirmation-time threshold before coding.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A build engineer reports success from a static linter and incorrectly claims that all implemented branches have been covered by tests. It does not establish the required result for this case: A revised statement defines the response-time limit and supports precise performance tests.

B:

This result may validate another testing scenario: A developer uses a static source-code analyzer and assumes every reported issue proves the application will fail when executed. It does not establish the required result for this case: A revised statement defines the response-time limit and supports precise performance tests.

C:

This result may validate another testing scenario: A safety-critical module requires an inspection, but the same developer authors, moderates, and individually approves all review findings without independent preparation. It does not establish the required result for this case: A revised statement defines the response-time limit and supports precise performance tests.