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[General] Reliable CTFL_Syll_4.0 Test Price, CTFL_Syll_4.0 Valid Exam Cram

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【General】 Reliable CTFL_Syll_4.0 Test Price, CTFL_Syll_4.0 Valid Exam Cram

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ISQI ISTQB Certified Tester Foundation Level (CTFL) v4.0 Sample Questions (Q114-Q119):NEW QUESTION # 114
Which of the following statements about branch coverage is true?
  • A. The minimum number of test cases needed to achieve full branch coverage, is usually lower than that needed to achieve full statement coverage
  • B. If full branch coverage has been achieved, then all unconditional branches within the code have surely been exercised
  • C. If full branch coverage has been achieved, then all combinations of conditions in a decision table have surely been exercised
  • D. Exercising at least one of the decision outcomes for all decisions within the code, ensures achieving full branch coverage
Answer: D
Explanation:
Exercising at least one of the decision outcomes for all decisions within the code, ensures achieving full branch coverage, which is a test coverage criterion that requires that all branches in the control flow of the code are executed at least once by the test cases. A branch is a basic block of code that has a single entry point and a single exit point, and a decision is a point in the code where the control flow can take more than one direction, such as an if-then-else statement, a switch-case statement, a loop statement, etc. The decision outcomes are the possible paths that can be taken from a decision, such as the then branch or the else branch, the case branch or the default branch, the loop body or the loop exit, etc. The other statements are false, because:
The minimum number of test cases needed to achieve full branch coverage, is usually higher than that needed to achieve full statement coverage, which is a test coverage criterion that requires that all executable statements in the code are executed at least once by the test cases. This is because branch coverage is a stronger criterion than statement coverage, as it implies statement coverage, but not vice versa. For example, a single test case can achieve full statement coverage for an if-then-else statement, but two test cases are needed to achieve full branch coverage, as both the then branch and the else branch need to be exercised.
If full branch coverage has been achieved, then all unconditional branches within the code have not necessarily been exercised, as unconditional branches are branches that do not depend on any decision, and are always executed, such as a goto statement, a break statement, a return statement, etc. Unconditional branches are not part of the branch coverage criterion, as they do not represent different paths in the control flow of the code. However, they are part of the statement coverage criterion, as they are executable statements in the code.
If full branch coverage has been achieved, then all combinations of conditions in a decision table have not necessarily been exercised, as a decision table is a test design technique that represents the logical relationships between multiple conditions and their corresponding actions, in a tabular format. A decision table can have more combinations of conditions than the number of decision outcomes in the code, as each condition can have two or more possible values, such as true or false, yes or no, etc. For example, a decision table with four conditions can have 16 combinations of conditions, but the corresponding code may have only two decision outcomes, such as pass or fail. To exercise all combinations of conditions in a decision table, a stronger test coverage criterion is needed, such as condition combination coverage, which requires that all possible combinations of condition outcomes in the code are executed at least once by the test cases. Reference: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:
ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 2.3.1, Test Coverage Criteria Based on the Structure of the Software ISTQB® Glossary of Testing Terms v4.0, Branch Coverage, Statement Coverage, Branch, Decision, Decision Outcome, Unconditional Branch, Decision Table, Condition Combination Coverage

NEW QUESTION # 115
Which of the following is the main difference between quality assurance (QA) and quality control (QC)?
  • A. QA is focused on implementation, while QC is focused on improvement.
  • B. QA is the responsibility of everyone on a project, while QC is the responsibility of a dedicated team.
  • C. QA is a process-oriented approach, while QC is a product-oriented approach.
  • D. QA is preventive, while QC is corrective.
Answer: C
Explanation:
Quality Assurance (QA) and Quality Control (QC) are both essential aspects of a comprehensive quality management system but they serve different purposes:
* Quality Assurance (QA): QA is a process-oriented approach that focuses on preventing defects by improving the processes used to develop and test products. It involves setting up processes, methodologies, and standards to ensure that the product meets quality requirements.
* Quality Control (QC): QC is a product-oriented approach that focuses on identifying defects in the final products. It involves activities such as inspection, testing, and review to ensure that the product meets the specified requirements and standards.
Thus, the main difference is that QA is process-oriented and preventive, while QC is product-oriented and corrective.

NEW QUESTION # 116
Which of the following statements best describes how configuration management supports testing?
  • A. Configuration management helps ensure that all relevant project documentation and software items are uniquely identified in all their versions and therefore can be unambiguously referenced in test documentation
  • B. Configuration management helps reduce testing effort by identifying a manageable number of test environment configurations in which to test the software, out of all possible configurations of the environment in which the software will be released
  • C. Configuration management is an approach to interoperability testing where tests are executed in the cloud, as the cloud can provide cost-effective access to multiple configurations of the test environments
  • D. Configuration management is an administrative discipline that includes change control, which is the process of controlling the changes to identified items referred to as Configuration Items'
Answer: A
Explanation:
This answer is correct because configuration management is a process of establishing and maintaining consistency of a product's performance, functional, and physical attributes with its requirements, design, and operational information throughout its life. Configuration management helps ensure that all relevant project documentation and software items are uniquely identified in all their versions and therefore can be unambiguously referenced in test documentation. This supports testing by providing traceability, consistency, and control over the test artifacts and the software under test. References: : ISTQB Glossary of Testing Terms v4.0, : ISTQB Foundation Level Syllabus v4.0, Section 2.2.2.2

NEW QUESTION # 117
Which of the following statements about estimation of the test effort is WRONG?
  • A. Effort estimate can be inaccurate because the quality of the product under tests is not known.
  • B. Effort estimate depends on the budget of the project.
  • C. Once the test effort is estimated, resources can be identified and a schedule can be drawn up.
  • D. Experience based estimation is one of the estimation techniques.
Answer: B
Explanation:
* Effort estimate does not depend on the budget of the project, but rather on the scope, complexity, and quality of the software product and the testing activities1. Budget is a constraint that may affect the feasibility and accuracy of the effort estimate, but it is not a factor that determines the effort estimate. Effort estimate is the amount of work required to complete the testing activities, measured in terms of person-hours, person-days, or person-months2.
* The other options are correct because:
* A. Once the test effort is estimated, resources can be identified and a schedule can be drawn up, as they are interrelated aspects of the test planning process3. Resources are the people, tools, equipment, and facilities needed to perform the testing activities4. Schedule is the time frame and sequence of the testing activities, aligned with the project milestones and deadlines5.
* B. Effort estimate can be inaccurate because the quality of the product under tests is not known, as it affects the number and severity of the defects that may be found and the rework that may be needed to fix them6. Quality is the degree to which the software product satisfies the specified requirements and meets the needs and expectations of the users and clients7.
* D. Experience based estimation is one of the estimation techniques, which relies on the judgment and expertise of the testers and other project stakeholders to estimate the test effort based on similar projects or tasks done in the past. Experience based estimation can be useful when there is a lack of historical data, formal methods, or detailed information about the software product and the testing activities.
References =
* 1 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 154
* 2 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 155
* 3 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 156
* 4 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 157
* 5 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 158
* 6 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 159
* 7 ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 16
* [8] ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 160
* [9] ISTQB Certified Tester Foundation Level Syllabus v4.0, 2023, p. 161

NEW QUESTION # 118
Following a risk-based testing approach you have designed 10 tests to cover a product risk with a high-risk level. You want to estimate, adopting the three-point test estimation technique, the test effort required to reduce the risk level to zero by executing those 10 tests. You made the following three initial estimates:
* most optimistic = 6 person hours
* most likely = 30 person hours
* most pessimistic = 54 person hours
Based only on the given information, which of the following answers about the three-point test estimation technique applied to this problem is true?
  • A. The final estimate is exactly 30 person hours because the technique uses the initial most likely estimate as the final estimate
  • B. The final estimate is exactly 30 person hours because the technique uses the arithmetic mean of the three initial estimates as the final estimate
  • C. The final estimate is between 22 person hours and 38 person hours
  • D. The final estimate is between 6 person hours and 54 person hours
Answer: C
Explanation:
The three-point test estimation technique is a method of estimating the test effort based on three initial estimates: the most optimistic, the most likely, and the most pessimistic. The technique uses a weighted average of these three estimates to calculate the final estimate, which is also known as the expected value. The formula for the expected value is:
Expected value = (most optimistic + 4 * most likely + most pessimistic) / 6 Using the given values, the expected value is:
Expected value = (6 + 4 * 30 + 54) / 6 Expected value = 30 person hours However, the expected value is not the only factor to consider when estimating the test effort. The technique also calculates the standard deviation, which is a measure of the variability or uncertainty of the estimates. The formula for the standard deviation is:
Standard deviation = (most pessimistic - most optimistic) / 6
Using the given values, the standard deviation is:
Standard deviation = (54 - 6) / 6 Standard deviation = 8 person hours
The standard deviation can be used to determine a range of possible values for the test effort, based on a certain level of confidence. For example, using a 68% confidence level, the range is:
Expected value ± standard deviation
Using the calculated values, the range is:
30 ± 8 person hours
Therefore, the final estimate is between 22 person hours and 38 person hours, which is option A.
References: ISTQB Certified Tester Foundation Level Syllabus v4.01, Section 2.3.2, page 24-25; ISTQB Glossary v4.02, page 33.

NEW QUESTION # 119
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