Free CTFL4 Exam Braindumps (page: 13)

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The following 4 equivalence classes are given:



Which of the following alternatives includes correct test values for x. based on equivalence partitioning?

  1. -100; 100:1000; 1001
  2. -500; 0; 100; 1000
  3. -99; 99:101; 1001
  4. -1000; -100; 100; 1000

Answer(s): D

Explanation:

The question is about selecting the correct test values for x based on equivalence partitioning. Equivalence partitioning is a software test design technique that divides the input data of a software unit into partitions of equivalent data from which test cases can be derived. In this case, the given equivalence classes are:
(x \leq -100)
(-100 < x < 100)
(100 \leq x < 1000)
(x \geq 1000)
Option D provides a value from each of these partitions:
For (x \leq -100), it gives -1000.

For (-100 < x < 100), it gives -100 and 100.
For (100 \leq x < 1000), it gives 500.
For (x \geq 1000), it gives 1500.
So, option D covers all four given equivalence classes with appropriate values.


Reference:

ISTQB Certified Tester Foundation Level (CTFL) v4.0 documents available at ISTQB and ASTQB.
1: ISTQB Foundation Level Syllabus 2018, Version 4.0, p. 38
2: ISTQB Foundation Level Syllabus 2018, Version 4.0, p. 39 : ISTQB Foundation Level Syllabus 2018, Version 4.0, p. 40



Which of the following coverage criteria results in the highest coverage for state transition based test cases?

  1. Can't be determined
  2. Covering all transitions at least once
  3. Covering only start and end states
  4. Covering all states at least once

Answer(s): B

Explanation:

Covering all transitions at least once is the highest coverage criterion for state transition based test cases, because it ensures that every possible change of state is tested at least once. This means that all the events that trigger the transitions, as well as the actions and outputs that result from the transitions, are verified. Covering all transitions at least once also implies covering all states at least once, but not vice versa. Therefore, option D is not the highest coverage criterion. Option C is the lowest coverage criterion, because it only tests the initial and final states of the system or component, without checking the intermediate states or transitions. Option A is incorrect, because the coverage criteria for state transition based test cases can be determined and compared based on the number of transitions and states covered. Reference = CTFL 4.0 Syllabus, Section 4.2.3, page 49- 50.



Which of the following lists factors That contribute to PROJECT risks?

  1. skill and staff shortages; problems in defining the right requirements, contractual issues.
  2. skill and staff shortages; software does not perform its intended functions; problems in defining the right requirements.
  3. problems in defining the right requirements; contractual issues; poor software quality characteristics.
  4. poor software quality characteristics; software does not perform its intended functions.

Answer(s): A

Explanation:

Project risks are the uncertainties or threats that may affect the project objectives, such as scope, schedule, cost, and quality. According to the ISTQB Certified Tester Foundation Level (CTFL) v4.0 syllabus, some of the factors that contribute to project risks are:
Skill and staff shortages: This factor refers to the lack of adequate or qualified human resources to perform the project tasks. This may result in delays, errors, rework, or low productivity. Problems in defining the right requirements: This factor refers to the difficulties or ambiguities in eliciting, analyzing, specifying, validating, or managing the requirements of the project. This may result in misalignment, inconsistencies, gaps, or changes in the requirements, affecting the project scope and quality.
Contractual issues: This factor refers to the challenges or disputes that may arise from the contractual agreements between the project parties, such as clients, suppliers, vendors, or subcontractors. This may result in legal, financial, or ethical risks, affecting the project delivery and satisfaction.
The other options are not correct because they list factors that contribute to PRODUCT risks, not project risks. Product risks are the uncertainties or threats that may affect the quality or functionality of the software product or system. Some of the factors that contribute to product risks are:
Poor software quality characteristics: This factor refers to the lack of adherence or compliance to the quality attributes or criteria of the software product or system, such as reliability, usability, security, performance, or maintainability. This may result in defects, failures, or dissatisfaction of the users or stakeholders.
Software does not perform its intended functions: This factor refers to the deviation or discrepancy between the expected and actual behavior or output of the software product or system. This may result in errors, faults, or malfunctions of the software product or system. Reference = ISTQB Certified Tester Foundation Level (CTFL) v4.0 syllabus, Chapter 1: Fundamentals of Testing, Section 1.5: Risks and Testing, Pages 14-16.



Which sequence of stated in the answer choices is correct in accordance with the following figure depicting the life-cycle of a defect?

  1. S0->S1->S2->S3->S5->S1
  2. S0->S1->S2->S3->S5->S1->S2->S3
  3. S0->S1->S2~>S3->S4
  4. S0->S1 ->S2->S3->S5->S3->S4

Answer(s): D

Explanation:

According to the ISTQB Certified Tester Foundation Level (CTFL) v4.0, the life cycle of a defect typically follows a sequence from its discovery to its closure. In the provided figure, it starts with S0

(New), moves to S1 (Assigned), then to S2 (Resolved), followed by S3 (Verified). If the defect is not fixed, it can be Re-opened (S5) and goes back for verification (S3). Once verified, it is Closed (S4).


Reference:

ISTQB Certified Tester Foundation Level (CTFL) v4.0 Syllabus, Section 1.4.3, Page 17.






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