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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 33

Question 320

During a release-readiness review, a tester observes: A browser-based app performs exactly to requirements on desktop but cannot complete payment on supported mobile devices with a virtual keyboard covering the submit button. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Include representative supported environments in the test configuration matrix.
  2. Document which quality characteristics each suite actually addresses.
  3. Include independent business-rule oracles in the test basis.
  4. Include data migration and decommissioning risks in maintenance test plans.

Explanation

Correct Answer

A:

This safeguard specifically targets the contributing cause: Include representative supported environments in the test configuration matrix. It addresses the principle (System quality includes device and usage-context behavior beyond a single functional test environment.) and can be assessed by: A customer completes a payment on each supported mobile profile without the keyboard hiding mandatory controls.

Incorrect Answers

B:

This preventive step mitigates a different project risk (syllabus section 2.2): A payment provider creates a new authentication algorithm and counts a security penetration test as proof that its business rules calculate fees correctly. The targeted safeguard for the current case is: Include representative supported environments in the test configuration matrix.

C:

This preventive step mitigates a different project risk (syllabus section 2.2): An insurance team executes code-based branch tests exclusively and overlooks a legally required policy exception absent from the implementation. The targeted safeguard for the current case is: Include representative supported environments in the test configuration matrix.

D:

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: Include representative supported environments in the test configuration matrix.

Question 321

A test analyst investigates the following quality concern: A logistics company patches a production operating system and assumes maintenance testing is unnecessary because no application source code changed. Which testing activity or corrective action best addresses this situation?

  1. Reassess compatibility, security and critical workflows after the platform change.
  2. Use suitable functional tests for fee rules and security tests for access and abuse risks.
  3. Align test level naming with the test object and objective, and plan a separate business acceptance evaluation.
  4. Convert the observation into an assigned improvement experiment with measurable success criteria.

Explanation

Correct Answer

A:

The targeted action is: Reassess compatibility, security and critical workflows after the platform change. It addresses the underlying software-testing principle: Maintenance testing may be necessary after environment changes as well as application code changes. The relevant confirming evidence is: Relevant services start and complete shipment transactions on the patched platform.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 2.2, Test Levels and Test Types): A payment provider creates a new authentication algorithm and counts a security penetration test as proof that its business rules calculate fees correctly. The present problem instead depends on: Maintenance testing may be necessary after environment changes as well as application code changes.

C:

This choice is a useful response to a different testing situation (section 2.2, Test Levels and Test Types): A technical team labels a database API contract test as an acceptance test even though no business stakeholder has approved end-to-end usefulness criteria. The present problem instead depends on: Maintenance testing may be necessary after environment changes as well as application code changes.

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 retrospective repeatedly lists environment delays but no corrective action is owned, so every iteration loses time to the same unavailable test database. The present problem instead depends on: Maintenance testing may be necessary after environment changes as well as application code changes.

Question 322

A test analyst investigates the following quality concern: A logistics company patches a production operating system and assumes maintenance testing is unnecessary because no application source code changed. Which observation best verifies that the stated testing issue is addressed?

  1. The missed legal exception fails a test even though existing branch coverage remains high.
  2. Existing account transfers and balances remain correct after the schema migration.
  3. Relevant services start and complete shipment transactions on the patched platform.
  4. System test design begins from system requirements even while development is ongoing.

Explanation

Correct Answer

C:

This is the expected verification outcome: Relevant services start and complete shipment transactions on the patched platform. It directly checks the corrective activity (Reassess compatibility, security and critical workflows after the platform change.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: An insurance team executes code-based branch tests exclusively and overlooks a legally required policy exception absent from the implementation. It does not establish the required result for this case: Relevant services start and complete shipment transactions on the patched platform.

B:

This result may validate another testing scenario: A bank migrates a database and executes only confirmation tests of known previous defects, overlooking transactions newly broken by the migration. It does not establish the required result for this case: Relevant services start and complete shipment transactions on the patched platform.

D:

This result may validate another testing scenario: A designer claims the V-model prohibits all iterative feedback and cannot support early test planning because diagrams put testing boxes after coding. It does not establish the required result for this case: Relevant services start and complete shipment transactions on the patched platform.

Question 323

A test analyst investigates the following quality concern: A logistics company patches a production operating system and assumes maintenance testing is unnecessary because no application source code changed. Which testing concept or underlying cause best explains the reported problem?

  1. Functional testing alone does not demonstrate non-functional performance quality.
  2. Black-box testing derives tests from observable specifications and cannot prove code-structure coverage.
  3. Environmental platform migration can break an otherwise unchanged application.
  4. Maintenance testing may be necessary after environment changes as well as application code changes.

Explanation

Correct Answer

D:

The most relevant explanation is: Maintenance testing may be necessary after environment changes as well as application code changes. This describes why the original situation (A logistics company patches a production operating system and assumes maintenance testing is unnecessary because no application source code changed.) merits the response: Reassess compatibility, security and critical workflows after the platform change.

Incorrect Answers

A:

This principle could explain a different testing issue: An online store completes functional checkout testing but users abandon the site because a product search takes twenty seconds during peak traffic. The present case is better explained by: Maintenance testing may be necessary after environment changes as well as application code changes.

B:

This principle could explain a different testing issue: 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 case is better explained by: Maintenance testing may be necessary after environment changes as well as application code changes.

C:

This principle could explain a different testing issue: 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. The present case is better explained by: Maintenance testing may be necessary after environment changes as well as application code changes.

Question 324

A test analyst investigates the following quality concern: A logistics company patches a production operating system and assumes maintenance testing is unnecessary because no application source code changed. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Include negative boundary and error cases in interface contracts.
  2. Treat platform and dependency upgrades as triggers for change-impact testing.
  3. Require both fix evidence and impact-driven regression selection.
  4. Include testing and review tasks in sprint planning and completion criteria.

Explanation

Correct Answer

B:

This safeguard specifically targets the contributing cause: Treat platform and dependency upgrades as triggers for change-impact testing. It addresses the principle (Maintenance testing may be necessary after environment changes as well as application code changes.) and can be assessed by: Relevant services start and complete shipment transactions on the patched platform.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 2.2): An authentication library passes isolated component checks but fails when the mobile app calls it with a missing refresh token. The targeted safeguard for the current case is: Treat platform and dependency upgrades as triggers for change-impact testing.

C:

This preventive step mitigates a different project risk (syllabus section 2.2): A software update corrects a failed coupon rule, and testers rerun only that coupon scenario while a nearby discount-rule regression escapes. The targeted safeguard for the current case is: Treat platform and dependency upgrades as triggers for change-impact testing.

D:

This preventive step mitigates a different project risk (syllabus section 2.1): An agile team finishes coding stories during a sprint but schedules all functional tests into a distant stabilization sprint, delaying discovery of regressions. The targeted safeguard for the current case is: Treat platform and dependency upgrades as triggers for change-impact testing.

Question 325

In a fictional application-delivery project, the team reports: 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. 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. Execute confirmation testing for the original crash and selected regression checks for related startup flows.
  3. Select impacted formatting and financial total tests with an explicit reasoned regression scope.
  4. Involve representative users in acceptance testing against realistic operational needs.

Explanation

Correct Answer

A:

The targeted action is: Use change-impact analysis to retest existing tax calculations affected by the runtime migration. It addresses the underlying software-testing principle: Maintenance testing addresses regression risk from changes to existing systems and environments. The relevant confirming evidence is: Representative historical filing fixtures produce correct expected outcomes under the new runtime.

Incorrect Answers

B:

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 testing addresses regression risk from changes to existing systems and environments.

C:

This choice is a useful response to a different testing situation (section 2.3, Maintenance Testing): 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 present problem instead depends on: Maintenance testing addresses regression risk from changes to existing systems and environments.

D:

This choice is a useful response to a different testing situation (section 2.2, Test Levels and Test Types): A hospital conducts acceptance testing with only the development team's synthetic workflow, and actual clinicians find no provision for emergency priority overrides. The present problem instead depends on: Maintenance testing addresses regression risk from changes to existing systems and environments.

Question 326

In a fictional application-delivery project, the team reports: 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. Which observation best verifies that the stated testing issue is addressed?

  1. Sampled records match source data and authorized auditors can retrieve the archive.
  2. Representative historical filing fixtures produce correct expected outcomes under the new runtime.
  3. Supported clients use the replacement endpoint and obsolete calls fail in the documented manner.
  4. Existing account transfers and balances remain correct after the schema migration.

Explanation

Correct Answer

B:

This is the expected verification outcome: Representative historical filing fixtures produce correct expected outcomes under the new runtime. It directly checks the corrective activity (Use change-impact analysis to retest existing tax calculations affected by the runtime migration.) for the described testing problem.

Incorrect Answers

A:

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: Representative historical filing fixtures produce correct expected outcomes under the new runtime.

C:

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: Representative historical filing fixtures produce correct expected outcomes under the new runtime.

D:

This result may validate another testing scenario: A bank migrates a database and executes only confirmation tests of known previous defects, overlooking transactions newly broken by the migration. It does not establish the required result for this case: Representative historical filing fixtures produce correct expected outcomes under the new runtime.

Question 327

In a fictional application-delivery project, the team reports: 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. Which testing concept or underlying cause best explains the reported problem?

  1. Maintenance testing addresses regression risk from changes to existing systems and environments.
  2. Retirement and migration activities may require testing even when new functionality is not delivered.
  3. Maintenance testing scope should be guided by impact and risk rather than always running everything.
  4. Confirmation testing checks a specific fix; regression testing checks for adverse side effects.

Explanation

Correct Answer

A:

The most relevant explanation is: Maintenance testing addresses regression risk from changes to existing systems and environments. This describes why the original situation (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.) merits the response: Use change-impact analysis to retest existing tax calculations affected by the runtime migration.

Incorrect Answers

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: Maintenance testing addresses regression risk from changes to existing systems and environments.

C:

This principle could explain a different testing issue: 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 present case is better explained by: Maintenance testing addresses regression risk from changes to existing systems and environments.

D:

This principle could explain a different testing issue: A software update corrects a failed coupon rule, and testers rerun only that coupon scenario while a nearby discount-rule regression escapes. The present case is better explained by: Maintenance testing addresses regression risk from changes to existing systems and environments.

Question 328

In a fictional application-delivery project, the team reports: 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. 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. Include data migration and decommissioning risks in maintenance test plans.
  3. Trace infrastructure changes to dependent business rules and associated regression cases.
  4. Use meaningful quality feedback in DevOps performance reviews.

Explanation

Correct Answer

C:

This safeguard specifically targets the contributing cause: Trace infrastructure changes to dependent business rules and associated regression cases. It addresses the principle (Maintenance testing addresses regression risk from changes to existing systems and environments.) and can be assessed by: Representative historical filing fixtures produce correct expected outcomes under the new runtime.

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: Trace infrastructure changes to dependent business rules and associated regression cases.

B:

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: Trace infrastructure changes to dependent business rules and associated regression cases.

D:

This preventive step mitigates a different project risk (syllabus section 2.1): An organization assesses software testing success by deployment frequency alone, with no indicator of escaped high-severity failures after releases. The targeted safeguard for the current case is: Trace infrastructure changes to dependent business rules and associated regression cases.

Question 329

A tester is asked to evaluate the following situation: 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. Which testing activity or corrective action best addresses this situation?

  1. Verify completeness, correctness and accessibility of the exported records as part of retirement maintenance testing.
  2. Select impacted formatting and financial total tests with an explicit reasoned regression scope.
  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

A:

The targeted action is: Verify completeness, correctness and accessibility of the exported records as part of retirement maintenance testing. It addresses the underlying software-testing principle: Retirement and migration activities may require testing even when new functionality is not delivered. The relevant confirming evidence is: Sampled records match source data and authorized auditors can retrieve the archive.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 2.3, Maintenance Testing): 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 present problem instead depends on: Retirement and migration activities may require testing even when new functionality is not delivered.

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: Retirement and migration activities may require testing even when new functionality is not delivered.

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: Retirement and migration activities may require testing even when new functionality is not delivered.

Question 330

A tester is asked to evaluate the following situation: 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. Which observation best verifies that the stated testing issue is addressed?

  1. Representative historical filing fixtures produce correct expected outcomes under the new runtime.
  2. A representative submission creates and consumes the expected message in the new region.
  3. Sampled records match source data and authorized auditors can retrieve the archive.
  4. The missed legal exception fails a test even though existing branch coverage remains high.

Explanation

Correct Answer

C:

This is the expected verification outcome: Sampled records match source data and authorized auditors can retrieve the archive. It directly checks the corrective activity (Verify completeness, correctness and accessibility of the exported records as part of retirement maintenance testing.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: 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. It does not establish the required result for this case: Sampled records match source data and authorized auditors can retrieve the archive.

B:

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: Sampled records match source data and authorized auditors can retrieve the archive.

D:

This result may validate another testing scenario: An insurance team executes code-based branch tests exclusively and overlooks a legally required policy exception absent from the implementation. It does not establish the required result for this case: Sampled records match source data and authorized auditors can retrieve the archive.