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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 70

Question 690

A tester is asked to evaluate the following situation: A user story describes bulk invoice import, but team members propose dozens of unrelated implementation details instead of discussing concrete user outcomes. Which observation best verifies that the stated testing issue is addressed?

  1. The team agrees on a measurable checkout completion expectation and corresponding examples.
  2. A seeded wrong price causes the appropriate acceptance scenario to fail before correction.
  3. The expired reward cannot be redeemed and no points are transferred.
  4. The resulting acceptance rules distinguish valid, partial and rejected imports.

Explanation

Correct Answer

D:

This is the expected verification outcome: The resulting acceptance rules distinguish valid, partial and rejected imports. It directly checks the corrective activity (Use a focused conversation around representative input examples, expected import status and errors.) for the described testing problem.

Incorrect Answers

A:

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 resulting acceptance rules distinguish valid, partial and rejected imports.

B:

This result may validate another testing scenario: A service team automates its Gherkin scenarios with step definitions that always return success regardless of the application's actual state. It does not establish the required result for this case: The resulting acceptance rules distinguish valid, partial and rejected imports.

C:

This result may validate another testing scenario: A loyalty engine has an 'expired' terminal status but the QA suite never tests attempts to redeem a reward after expiration. It does not establish the required result for this case: The resulting acceptance rules distinguish valid, partial and rejected imports.

Question 691

A tester is asked to evaluate the following situation: A user story describes bulk invoice import, but team members propose dozens of unrelated implementation details instead of discussing concrete user outcomes. Which testing concept or underlying cause best explains the reported problem?

  1. Collaborative examples expose edge cases overlooked by a broad user story.
  2. Collaborative acceptance testing improves shared understanding and prevents conflicting test bases.
  3. Collaborative story writing reduces scope confusion by grounding discussion in behavior and examples.
  4. Multiple adjacent equivalence classes create multiple relevant boundaries and possible off-by-one errors.

Explanation

Correct Answer

C:

The most relevant explanation is: Collaborative story writing reduces scope confusion by grounding discussion in behavior and examples. This describes why the original situation (A user story describes bulk invoice import, but team members propose dozens of unrelated implementation details instead of discussing concrete user outcomes.) merits the response: Use a focused conversation around representative input examples, expected import status and errors.

Incorrect Answers

A:

This principle could explain a different testing issue: A restaurant app story describes table booking but omits what happens if two customers reserve the last table simultaneously. The present case is better explained by: Collaborative story writing reduces scope confusion by grounding discussion in behavior and examples.

B:

This principle could explain a different testing issue: An agile banking team writes different expected amounts in unit tests and acceptance examples because they were specified by different groups without collaboration. The present case is better explained by: Collaborative story writing reduces scope confusion by grounding discussion in behavior and examples.

D:

This principle could explain a different testing issue: 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 case is better explained by: Collaborative story writing reduces scope confusion by grounding discussion in behavior and examples.

Question 692

A tester is asked to evaluate the following situation: A user story describes bulk invoice import, but team members propose dozens of unrelated implementation details instead of discussing concrete user outcomes. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Review scenario sets for contradictions before automation.
  2. Include testers, developers and business owners in story refinement.
  3. Inspect unexercised outcomes after achieving statement coverage.
  4. Apply example mapping to separate rules, questions, and illustrative cases.

Explanation

Correct Answer

D:

This safeguard specifically targets the contributing cause: Apply example mapping to separate rules, questions, and illustrative cases. It addresses the principle (Collaborative story writing reduces scope confusion by grounding discussion in behavior and examples.) and can be assessed by: The resulting acceptance rules distinguish valid, partial and rejected imports.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 4.5): A health portal has conflicting acceptance examples for whether an unsigned consent form can unlock record sharing, and the team implements whichever one it reads first. The targeted safeguard for the current case is: Apply example mapping to separate rules, questions, and illustrative cases.

B:

This preventive step mitigates a different project risk (syllabus section 4.5): 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 targeted safeguard for the current case is: Apply example mapping to separate rules, questions, and illustrative cases.

C:

This preventive step mitigates a different project risk (syllabus section 4.3): A developer sees 100% statement coverage on an eligibility function but the rejection branch that contains no executable statements is never taken. The targeted safeguard for the current case is: Apply example mapping to separate rules, questions, and illustrative cases.

Question 693

A quality engineering exercise presents this condition: A billing feature lists acceptance criteria that depend on a hidden internal database column not visible to stakeholders, making the result impossible to verify from business behavior. Which testing activity or corrective action best addresses this situation?

  1. Resolve conflicting examples through joint business, legal and test discussion before implementation.
  2. Rewrite criteria around observable invoice and ledger outcomes while separately testing internal implementation where useful.
  3. Add acceptance examples covering competing requests and the expected atomic booking outcome.
  4. Derive test conditions from the rule and select a suitable black-box technique for discount ranges.

Explanation

Correct Answer

B:

The targeted action is: Rewrite criteria around observable invoice and ledger outcomes while separately testing internal implementation where useful. It addresses the underlying software-testing principle: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints. The relevant confirming evidence is: A stakeholder can confirm the accepted billing output without direct access to implementation internals.

Incorrect Answers

A:

This choice is a useful response to a different testing situation (section 4.5, Collaboration-based Test Approaches): A health portal has conflicting acceptance examples for whether an unsigned consent form can unlock record sharing, and the team implements whichever one it reads first. The present problem instead depends on: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

C:

This choice is a useful response to a different testing situation (section 4.5, Collaboration-based Test Approaches): A restaurant app story describes table booking but omits what happens if two customers reserve the last table simultaneously. The present problem instead depends on: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

D:

This choice is a useful response to a different testing situation (section 4.1, Test Techniques Overview): 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 problem instead depends on: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

Question 694

A quality engineering exercise presents this condition: A billing feature lists acceptance criteria that depend on a hidden internal database column not visible to stakeholders, making the result impossible to verify from business behavior. Which observation best verifies that the stated testing issue is addressed?

  1. The resulting acceptance rules distinguish valid, partial and rejected imports.
  2. Developers implement against agreed examples and stakeholders verify the final result.
  3. Each integer boundary case is processed according to its documented acceptance range.
  4. A stakeholder can confirm the accepted billing output without direct access to implementation internals.

Explanation

Correct Answer

D:

This is the expected verification outcome: A stakeholder can confirm the accepted billing output without direct access to implementation internals. It directly checks the corrective activity (Rewrite criteria around observable invoice and ledger outcomes while separately testing internal implementation where useful.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: A user story describes bulk invoice import, but team members propose dozens of unrelated implementation details instead of discussing concrete user outcomes. It does not establish the required result for this case: A stakeholder can confirm the accepted billing output without direct access to implementation internals.

B:

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: A stakeholder can confirm the accepted billing output without direct access to implementation internals.

C:

This result may validate another testing scenario: A warehouse selector accepts product weights in integer grams 100–500, but one test contains 99.5 grams even though the interface accepts only integers. It does not establish the required result for this case: A stakeholder can confirm the accepted billing output without direct access to implementation internals.

Question 695

A quality engineering exercise presents this condition: A billing feature lists acceptance criteria that depend on a hidden internal database column not visible to stakeholders, making the result impossible to verify from business behavior. Which testing concept or underlying cause best explains the reported problem?

  1. Collaborative story development builds shared understanding and reduces ambiguity before implementation.
  2. Acceptance criteria define conditions for story acceptance and must be concrete and testable.
  3. Exploratory testing combines learning, design and execution while benefiting from a bounded charter and record.
  4. Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

Explanation

Correct Answer

D:

The most relevant explanation is: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints. This describes why the original situation (A billing feature lists acceptance criteria that depend on a hidden internal database column not visible to stakeholders, making the result impossible to verify from business behavior.) merits the response: Rewrite criteria around observable invoice and ledger outcomes while separately testing internal implementation where useful.

Incorrect Answers

A:

This principle could explain a different testing issue: 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 case is better explained by: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

B:

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: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

C:

This principle could explain a different testing issue: A mobile shopping team begins exploratory testing with no mission, timebox, or recorded observations, then cannot explain what its findings cover. The present case is better explained by: Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.

Question 696

A quality engineering exercise presents this condition: A billing feature lists acceptance criteria that depend on a hidden internal database column not visible to stakeholders, making the result impossible to verify from business behavior. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Check temporal phrases such as 'within' and 'at least' during acceptance example review.
  2. Check business observability and independence from implementation during criteria review.
  3. Include benefit and target persona in collaborative story refinement.
  4. Review whether the requested boundary coverage criterion is two-value or three-value before accepting a suite.

Explanation

Correct Answer

B:

This safeguard specifically targets the contributing cause: Check business observability and independence from implementation during criteria review. It addresses the principle (Acceptance criteria express verifiable stakeholder behavior rather than arbitrary technical design constraints.) and can be assessed by: A stakeholder can confirm the accepted billing output without direct access to implementation internals.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 4.5): A flight booking story says refunds must complete within seven days, but a test expects exactly seven days instead of verifying the maximum permitted time. The targeted safeguard for the current case is: Check business observability and independence from implementation during criteria review.

C:

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: Check business observability and independence from implementation during criteria review.

D:

This preventive step mitigates a different project risk (syllabus section 4.2): A booking API allows 1–6 passengers, and a developer asserts that 1, 3, 6, and 7 prove three-value boundary coverage. The targeted safeguard for the current case is: Check business observability and independence from implementation during criteria review.

Question 697

A software testing team encounters the following project situation: An ATM team specifies 'if PIN invalid then reject' but never specifies what happens after three consecutive failures, leaving an account-lockout security gap. Which testing activity or corrective action best addresses this situation?

  1. Add explicit acceptance rules and example sequences for retry count and lockout.
  2. Collaboratively refine the story with concrete examples and testable acceptance criteria.
  3. Add representative invalid and exception examples during collaborative scenario review.
  4. Measure separately which requirement conditions and structural items are exercised by the tests.

Explanation

Correct Answer

A:

The targeted action is: Add explicit acceptance rules and example sequences for retry count and lockout. It addresses the underlying software-testing principle: Examples and criteria help uncover state-dependent behavior missing from simple rules. The relevant confirming evidence is: Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path.

Incorrect Answers

B:

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: Examples and criteria help uncover state-dependent behavior missing from simple rules.

C:

This choice is a useful response to a different testing situation (section 4.5, Collaboration-based Test Approaches): A product team writes acceptance examples for the happy path only and discovers after release that malformed address input crashes shipping label creation. The present problem instead depends on: Examples and criteria help uncover state-dependent behavior missing from simple rules.

D:

This choice is a useful response to a different testing situation (section 4.1, Test Techniques Overview): A team treats automated test-count growth as proof that it has covered every requirement and structural path. The present problem instead depends on: Examples and criteria help uncover state-dependent behavior missing from simple rules.

Question 698

A software testing team encounters the following project situation: An ATM team specifies 'if PIN invalid then reject' but never specifies what happens after three consecutive failures, leaving an account-lockout security gap. Which observation best verifies that the stated testing issue is addressed?

  1. A proposed implementation that contradicts the scenario fails the agreed acceptance check.
  2. A malformed address receives the expected user-facing validation rather than crashing.
  3. Orders with only active subscription and only high value each receive free delivery as specified.
  4. Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path.

Explanation

Correct Answer

D:

This is the expected verification outcome: Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path. It directly checks the corrective activity (Add explicit acceptance rules and example sequences for retry count and lockout.) for the described testing problem.

Incorrect Answers

A:

This result may validate another testing scenario: An agile team writes Given-When-Then scenarios only after coding, so the examples merely reproduce existing behavior rather than the intended business rule. It does not establish the required result for this case: Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path.

B:

This result may validate another testing scenario: A product team writes acceptance examples for the happy path only and discovers after release that malformed address input crashes shipping label creation. It does not establish the required result for this case: Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path.

C:

This result may validate another testing scenario: A service gives free delivery when either subscription is Active or order exceeds $80, but testers assume both conditions must be true. It does not establish the required result for this case: Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path.

Question 699

A software testing team encounters the following project situation: An ATM team specifies 'if PIN invalid then reject' but never specifies what happens after three consecutive failures, leaving an account-lockout security gap. Which testing concept or underlying cause best explains the reported problem?

  1. A useful user story communicates stakeholder need and value rather than being only an implementation request.
  2. Examples and criteria help uncover state-dependent behavior missing from simple rules.
  3. ATDD aims to clarify expectations early through collaboration and test-first acceptance thinking.
  4. Defects commonly occur near transition boundaries that middle-of-partition tests do not cover.

Explanation

Correct Answer

B:

The most relevant explanation is: Examples and criteria help uncover state-dependent behavior missing from simple rules. This describes why the original situation (An ATM team specifies 'if PIN invalid then reject' but never specifies what happens after three consecutive failures, leaving an account-lockout security gap.) merits the response: Add explicit acceptance rules and example sequences for retry count and lockout.

Incorrect Answers

A:

This principle could explain a different testing issue: 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 present case is better explained by: Examples and criteria help uncover state-dependent behavior missing from simple rules.

C:

This principle could explain a different testing issue: A project runs ATDD meetings after delivery and labels the production demo as the first moment stakeholders can define expected outcomes. The present case is better explained by: Examples and criteria help uncover state-dependent behavior missing from simple rules.

D:

This principle could explain a different testing issue: 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 case is better explained by: Examples and criteria help uncover state-dependent behavior missing from simple rules.

Question 700

A software testing team encounters the following project situation: An ATM team specifies 'if PIN invalid then reject' but never specifies what happens after three consecutive failures, leaving an account-lockout security gap. Which repeatable testing practice most directly reduces recurrence of this problem?

  1. Review examples for both qualifying and nonqualifying business cases.
  2. Check temporal phrases such as 'within' and 'at least' during acceptance example review.
  3. Select a condition-combination technique when business logic uses multiple predicates.
  4. Include repeated-event and state-change examples in acceptance planning.

Explanation

Correct Answer

D:

This safeguard specifically targets the contributing cause: Include repeated-event and state-change examples in acceptance planning. It addresses the principle (Examples and criteria help uncover state-dependent behavior missing from simple rules.) and can be assessed by: Three failures lock the account as agreed, while a permitted reset follows the authorized recovery path.

Incorrect Answers

A:

This preventive step mitigates a different project risk (syllabus section 4.5): An e-commerce story has one acceptance sentence, 'the discount works', and the tester cannot determine which customer segments qualify. The targeted safeguard for the current case is: Include repeated-event and state-change examples in acceptance planning.

B:

This preventive step mitigates a different project risk (syllabus section 4.5): A flight booking story says refunds must complete within seven days, but a test expects exactly seven days instead of verifying the maximum permitted time. The targeted safeguard for the current case is: Include repeated-event and state-change examples in acceptance planning.

C:

This preventive step mitigates a different project risk (syllabus section 4.2): A travel claim uses conditions 'flight cancelled' and 'replacement provided', with compensation depending on their combination; the tester groups all cancellation cases into one partition. The targeted safeguard for the current case is: Include repeated-event and state-change examples in acceptance planning.