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Exam Code: CTFL v4.0

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

Certification Provider: ISTQB

Corresponding Certification: CTFL

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ISTQB CTFL v4.0 Practice Test 47

Question 460

A software testing team encounters the following project situation: A tester relies on a checklist of historic outages and misses a newly required age boundary in a registration feature. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Report denominators and coverage measures appropriate to the technique.
  2. Combine structural and business-rule coverage when selecting a test approach.
  3. Combine fresh requirements analysis with historical defect lessons.
  4. Include benefit and target persona in collaborative story refinement.

Explanation

Correct Answer

C:

This safeguard specifically targets the contributing cause: Combine fresh requirements analysis with historical defect lessons. It addresses the principle (Experience-based testing complements but does not replace structured black-box techniques.) and can be assessed by: The suite includes newly specified age limits plus failure patterns from previous releases.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 4.1): A team treats automated test-count growth as proof that it has covered every requirement and structural path. The targeted safeguard for the current case is: Combine fresh requirements analysis with historical defect lessons.

B:

This preventive step mitigates a different project risk (syllabus section 4.1): A programmer obtains statement coverage for an unfamiliar tax module but declares that the work proves the legal requirements are complete. The targeted safeguard for the current case is: Combine fresh requirements analysis with historical defect lessons.

D:

This preventive step mitigates a different project risk (syllabus section 4.5): A shipping team's testers receive a story with the words 'As a user' but no actual business benefit, leading to tests that optimize a technically valid but irrelevant feature. The targeted safeguard for the current case is: Combine fresh requirements analysis with historical defect lessons.

Question 461

During a release-readiness review, a tester observes: A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. Which testing activity or corrective action best addresses this situation?

  1. Match test techniques to the work product: suitable partitions for search and decision tables for the eligibility logic.
  2. Add systematic specification-derived boundary cases while retaining useful experience-based checks.
  3. Supplement structural coverage with specification-derived tests of all applicable tax requirements.
  4. Collaboratively refine the story with concrete examples and testable acceptance criteria.

Explanation

Correct Answer

A:

The targeted action is: Match test techniques to the work product: suitable partitions for search and decision tables for the eligibility logic. It addresses the underlying software-testing principle: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases. The relevant confirming evidence is: The eligibility cases cover relevant combinations and the search uses representative text classes.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 4.1, Test Techniques Overview): A tester relies on a checklist of historic outages and misses a newly required age boundary in a registration feature. The present problem instead depends on: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.

C:

This choice is a useful response to a different testing situation (section 4.1, Test Techniques Overview): A programmer obtains statement coverage for an unfamiliar tax module but declares that the work proves the legal requirements are complete. The present problem instead depends on: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.

D:

This choice is a useful response to a different testing situation (section 4.5, Collaboration-based Test Approaches): A product owner writes the user story 'As a customer I want faster checkout' with no measurable behavior, and developers and testers assume different interpretations. The present problem instead depends on: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.

Question 462

During a release-readiness review, a tester observes: A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. Which observation best verifies that the stated testing issue is addressed?

  1. A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.
  2. The suite includes newly specified age limits plus failure patterns from previous releases.
  3. The eligibility cases cover relevant combinations and the search uses representative text classes.
  4. The team agrees on a measurable checkout completion expectation and corresponding examples.

Explanation

Correct Answer

C:

This is the expected verification outcome: The eligibility cases cover relevant combinations and the search uses representative text classes. It directly checks the corrective activity (Match test techniques to the work product: suitable partitions for search and decision tables for the eligibility logic.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A team treats automated test-count growth as proof that it has covered every requirement and structural path. It does not establish the required result for this case: The eligibility cases cover relevant combinations and the search uses representative text classes.

B:

This result may validate another testing scenario: A tester relies on a checklist of historic outages and misses a newly required age boundary in a registration feature. It does not establish the required result for this case: The eligibility cases cover relevant combinations and the search uses representative text classes.

D:

This result may validate another testing scenario: A product owner writes the user story 'As a customer I want faster checkout' with no measurable behavior, and developers and testers assume different interpretations. It does not establish the required result for this case: The eligibility cases cover relevant combinations and the search uses representative text classes.

Question 463

During a release-readiness review, a tester observes: A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. Which testing concept or underlying cause best explains the reported problem?

  1. Test quantity is not equivalent to coverage across black-box or white-box criteria.
  2. Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.
  3. White-box techniques evaluate implementation structure and cannot establish unimplemented requirement coverage.
  4. Executing one side of a two-way decision can achieve statement goals elsewhere while leaving an outcome untested.

Explanation

Correct Answer

B:

The most relevant explanation is: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases. This describes why the original situation (A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions.) merits the response: Match test techniques to the work product: suitable partitions for search and decision tables for the eligibility logic.

Incorrect Answers

A:

This principle could explain a different testing issue: A team treats automated test-count growth as proof that it has covered every requirement and structural path. The present case is better explained by: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.

C:

This principle could explain a different testing issue: A programmer obtains statement coverage for an unfamiliar tax module but declares that the work proves the legal requirements are complete. The present case is better explained by: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.

D:

This principle could explain a different testing issue: A component contains an if branch that computes a discount only for Premium customers, and tests cover Premium input alone yet report 100% branch coverage. The present case is better explained by: Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.

Question 464

During a release-readiness review, a tester observes: A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Combine structural and business-rule coverage when selecting a test approach.
  2. State the rationale for each test design method in test planning.
  3. Review the test basis before choosing design techniques and input values.
  4. Specify transition rules and forbidden sequences separately from status enumeration.

Explanation

Correct Answer

B:

This safeguard specifically targets the contributing cause: State the rationale for each test design method in test planning. It addresses the principle (Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.) and can be assessed by: The eligibility cases cover relevant combinations and the search uses representative text classes.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 4.1): A programmer obtains statement coverage for an unfamiliar tax module but declares that the work proves the legal requirements are complete. The targeted safeguard for the current case is: State the rationale for each test design method in test planning.

C:

This preventive step mitigates a different project risk (syllabus section 4.1): A team chooses randomized inputs for a shipping discount before reading the discount rule, then claims it has performed systematic specification-based test design. The targeted safeguard for the current case is: State the rationale for each test design method in test planning.

D:

This preventive step mitigates a different project risk (syllabus section 4.2): An order fulfillment API has 12 valid statuses but the test suite sends each status value directly while never testing that Delivered cannot return to Packing. The targeted safeguard for the current case is: State the rationale for each test design method in test planning.

Question 465

A test analyst investigates the following quality concern: A team treats automated test-count growth as proof that it has covered every requirement and structural path. Which testing activity or corrective action best addresses this situation?

  1. Measure separately which requirement conditions and structural items are exercised by the tests.
  2. Supplement structural coverage with specification-derived tests of all applicable tax requirements.
  3. Match test techniques to the work product: suitable partitions for search and decision tables for the eligibility logic.
  4. Add requirements-based duplicate-payment scenarios independently of structural coverage.

Explanation

Correct Answer

A:

The targeted action is: Measure separately which requirement conditions and structural items are exercised by the tests. It addresses the underlying software-testing principle: Test quantity is not equivalent to coverage across black-box or white-box criteria. The relevant confirming evidence is: A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.

Incorrect Answers

B:

This choice is a useful response to a different testing situation (section 4.1, Test Techniques Overview): A programmer obtains statement coverage for an unfamiliar tax module but declares that the work proves the legal requirements are complete. The present problem instead depends on: Test quantity is not equivalent to coverage across black-box or white-box criteria.

C:

This choice is a useful response to a different testing situation (section 4.1, Test Techniques Overview): A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. The present problem instead depends on: Test quantity is not equivalent to coverage across black-box or white-box criteria.

D:

This choice is a useful response to a different testing situation (section 4.3, White-Box Test Techniques): A team has 100% branch coverage for its error-prone payment module but ignores a requirement for duplicate-charge prevention absent from all code. The present problem instead depends on: Test quantity is not equivalent to coverage across black-box or white-box criteria.

Question 466

A test analyst investigates the following quality concern: A team treats automated test-count growth as proof that it has covered every requirement and structural path. Which observation best verifies that the stated testing issue is addressed?

  1. Each documented discount class has a representative input with an expected total.
  2. A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.
  3. The eligibility cases cover relevant combinations and the search uses representative text classes.
  4. The test set exercises immediately below, on, and immediately above each boundary.

Explanation

Correct Answer

B:

This is the expected verification outcome: A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts. It directly checks the corrective activity (Measure separately which requirement conditions and structural items are exercised by the tests.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A team chooses randomized inputs for a shipping discount before reading the discount rule, then claims it has performed systematic specification-based test design. It does not establish the required result for this case: A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.

C:

This result may validate another testing scenario: A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. It does not establish the required result for this case: A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.

D:

This result may validate another testing scenario: A booking API allows 1–6 passengers, and a developer asserts that 1, 3, 6, and 7 prove three-value boundary coverage. It does not establish the required result for this case: A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.

Question 467

A test analyst investigates the following quality concern: A team treats automated test-count growth as proof that it has covered every requirement and structural path. Which testing concept or underlying cause best explains the reported problem?

  1. Black-box techniques derive tests from the specified behavior without needing code structure.
  2. Test quantity is not equivalent to coverage across black-box or white-box criteria.
  3. Technique selection depends on the kind of behavior and information available, not one preferred method for all cases.
  4. Acceptance criteria define conditions for story acceptance and must be concrete and testable.

Explanation

Correct Answer

B:

The most relevant explanation is: Test quantity is not equivalent to coverage across black-box or white-box criteria. This describes why the original situation (A team treats automated test-count growth as proof that it has covered every requirement and structural path.) merits the response: Measure separately which requirement conditions and structural items are exercised by the tests.

Incorrect Answers

A:

This principle could explain a different testing issue: A team chooses randomized inputs for a shipping discount before reading the discount rule, then claims it has performed systematic specification-based test design. The present case is better explained by: Test quantity is not equivalent to coverage across black-box or white-box criteria.

C:

This principle could explain a different testing issue: A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. The present case is better explained by: Test quantity is not equivalent to coverage across black-box or white-box criteria.

D:

This principle could explain a different testing issue: An e-commerce story has one acceptance sentence, 'the discount works', and the tester cannot determine which customer segments qualify. The present case is better explained by: Test quantity is not equivalent to coverage across black-box or white-box criteria.

Question 468

A test analyst investigates the following quality concern: A team treats automated test-count growth as proof that it has covered every requirement and structural path. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. State the rationale for each test design method in test planning.
  2. Report denominators and coverage measures appropriate to the technique.
  3. Combine structural and business-rule coverage when selecting a test approach.
  4. Combine black-box behavioral oracles with structural metrics for release confidence.

Explanation

Correct Answer

B:

This safeguard specifically targets the contributing cause: Report denominators and coverage measures appropriate to the technique. It addresses the principle (Test quantity is not equivalent to coverage across black-box or white-box criteria.) and can be assessed by: A coverage report reveals one untested requirement and an uncovered conditional outcome despite hundreds of scripts.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 4.1): A team always selects decision tables for simple free-text search without constraints and reserves no method for a complex eligibility rule with multiple conditions. The targeted safeguard for the current case is: Report denominators and coverage measures appropriate to the technique.

C:

This preventive step mitigates a different project risk (syllabus section 4.1): A programmer obtains statement coverage for an unfamiliar tax module but declares that the work proves the legal requirements are complete. The targeted safeguard for the current case is: Report denominators and coverage measures appropriate to the technique.

D:

This preventive step mitigates a different project risk (syllabus section 4.3): A team has 100% branch coverage for its error-prone payment module but ignores a requirement for duplicate-charge prevention absent from all code. The targeted safeguard for the current case is: Report denominators and coverage measures appropriate to the technique.

Question 469

In a fictional application-delivery project, the team reports: A subscription form accepts plans for 1–12 months, but the suite tests 2, 3 and 4 months while never testing an invalid number. Which testing activity or corrective action best addresses this situation?

  1. Exercise the lower and upper boundaries and their nearest relevant neighbors with the required precision.
  2. Define a representative for each discount partition and test $49.99, $50, $99.99, and $100 edges.
  3. Execute both the true and false outcomes of the Premium conditional.
  4. Identify below-range, within-range, and above-range equivalence partitions and choose representatives.

Explanation

Correct Answer

D:

The targeted action is: Identify below-range, within-range, and above-range equivalence partitions and choose representatives. It addresses the underlying software-testing principle: Equivalence partitioning selects representatives from classes expected to receive similar treatment. The relevant confirming evidence is: The case set includes a valid month and rejects 0 and 13 consistently.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 4.2, Black-Box Test Techniques): A delivery app supports parcel weight 0.1–30.0 kg, yet testing uses only many ordinary weights in the middle of the range. The present problem instead depends on: Equivalence partitioning selects representatives from classes expected to receive similar treatment.

B:

This choice is a useful response to a different testing situation (section 4.2, Black-Box Test Techniques): A promo engine gives different discounts for cart totals below $50, $50–$99.99, and at least $100, while cases only verify $75. The present problem instead depends on: Equivalence partitioning selects representatives from classes expected to receive similar treatment.

C:

This choice is a useful response to a different testing situation (section 4.3, White-Box Test Techniques): A component contains an if branch that computes a discount only for Premium customers, and tests cover Premium input alone yet report 100% branch coverage. The present problem instead depends on: Equivalence partitioning selects representatives from classes expected to receive similar treatment.

Question 470

In a fictional application-delivery project, the team reports: A subscription form accepts plans for 1–12 months, but the suite tests 2, 3 and 4 months while never testing an invalid number. Which observation best verifies that the stated testing issue is addressed?

  1. Cases verify 2, 3, and 4 have the documented outcomes around the upper limit.
  2. The form accepts 5 and 50 but rejects 4 and 51 as expected.
  3. The case set includes a valid month and rejects 0 and 13 consistently.
  4. Developers implement against agreed examples and stakeholders verify the final result.

Explanation

Correct Answer

C:

This is the expected verification outcome: The case set includes a valid month and rejects 0 and 13 consistently. It directly checks the corrective activity (Identify below-range, within-range, and above-range equivalence partitions and choose representatives.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A pharmacy system supports refill counts 0–3 but a tester chooses -1, 0, 1 and 2, claiming both the minimum and maximum boundaries are covered. It does not establish the required result for this case: The case set includes a valid month and rejects 0 and 13 consistently.

B:

This result may validate another testing scenario: A customer service form accepts 5–50 characters, and a tester chooses exactly 5 and 50 but never checks rejection outside the range. It does not establish the required result for this case: The case set includes a valid month and rejects 0 and 13 consistently.

D:

This result may validate another testing scenario: A project runs ATDD meetings after delivery and labels the production demo as the first moment stakeholders can define expected outcomes. It does not establish the required result for this case: The case set includes a valid month and rejects 0 and 13 consistently.