[2024] CTFL_Syll_4.0 All-in-One Exam Guide Practice To your CTFL_Syll_4.0 Exam!
Preparations of CTFL_Syll_4.0 Exam 2024 ISTQB Foundation Level Unlimited 153 Questions
NEW QUESTION # 32
Which of the following IS the BEST example of whole team approach
- A. Testing is the responsibility of the entire team
- B. Anyone can perform a task they are capable of
- C. Sharing same physical workspace is a must
- D. Developers should depend on the business analysts as there is no distinction between testers and developers
Answer: A
Explanation:
The whole team approach in testing means that the responsibility for testing is shared among all members of the team, not just the testers. This concept is emphasized in agile methodologies where collaboration and collective ownership of quality are key principles. Each team member, including developers, business analysts, and testers, contributes to the testing process, ensuring that quality is built into the product from the beginning.
References:
* ISTQB CTFL Syllabus V4.0, Section 1.5.2 on the "whole team approach" which describes the collective responsibility of the team for testing.
NEW QUESTION # 33
Consider a review for a high-level architectural document written by a software architect. The architect does most of the review preparation work, including distributing the document to reviewers before the review meeting. However, reviewers are not required to analyze the document in advance, and during the review meeting the software architect explains the document step by step. The only goal of this review is to establish a common understanding of the software architecture that will be used in a software development project.
Which of the following review types does this review refer to?
- A. Inspection
- B. Audit
- C. Walkthrough
- D. Informal review
Answer: C
Explanation:
This answer is correct because a walkthrough is a type of review where the author of the work product leads the review process and explains the work product to the reviewers. The reviewers are not required to prepare for the review in advance, and the main objective of the walkthrough is to establish a common understanding of the work product and to identify any major defects or issues. A walkthrough is usually informal and does not follow a defined process or roles. In this case, the review for a high-level architectural document written by a software architect matches the characteristics of a walkthrough. References: ISTQB Glossary of Testing Terms v4.0, ISTQB Foundation Level Syllabus v4.0, Section 2.4.2.2
NEW QUESTION # 34
Which of the following statements describes regression testing?
I. Retesting of a fixed defect
II. Testing of an already tested program
III. Testing of new functionality in a program
IV. Regression testing applies only to functional testing
V Tests that do not nave to be repeatable, because They are only used once
- A. II, IV, V
- B. I, IV
- C. II
- D. I, III, IV
Answer: C
Explanation:
Regression testing is the re-running of functional and non-functional tests to ensure that previously developed and tested software still performs as expected after a change1 It does not involve retesting of a fixed defect, testing of new functionality, or applying only to functional testing. Tests that are used for regression testing should be repeatable, because they are used to verify the stability of the software after each change2 References = ISTQB Certified Tester Foundation Level (CTFL) v4.0 Syllabus, Chapter 4, Section
4.2.2, Page 291; ISTQB Glossary of Testing Terms v4.0, Page 292
NEW QUESTION # 35
A company wants to reward each of its salespeople with an annual bonus that represents the sum of all the bonuses accumulated for every single sale made by that salesperson. The bonus for a single sale can take on the following four values: 3%, 5%, 7% and 10% (the percentage refers to the amount of the single sale). These values are determined on the basis of the type of customer (classified as "Basic" or "Premium") to which such sale was made, and on the amount of such sale classified into the following three groups G1, G2 and G3:
* [G1]: less than 300 euros
* [G2]: between 300 and 2000 euros
* [G3]: greater than 2000 euros
Which of the following is the minimum number of test cases needed to cover the full decision table associated with this scenario?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
The minimum number of test cases needed to cover the full decision table associated with this scenario is 6. This is because the decision table has 4 conditions (type of customer and amount of sale) and 4 actions (bonus percentage). The conditions have 2 possible values each (Basic or Premium, and G1, G2 or G3), so the total number of combinations is 2 x 2 x 2 x 2 = 16. However, not all combinations are valid, as some of them are contradictory or impossible. For example, a sale cannot be both less than 300 euros and greater than 2000 euros at the same time. Therefore, we need to eliminate the invalid combinations and keep only the valid ones. The valid combinations are:
Type of customer
Amount of sale
Bonus percentage
Basic
G1
3%
Basic
G2
5%
Basic
G3
7%
Premium
G1
5%
Premium
G2
7%
Premium
G3
10%
These 6 combinations cover all the possible values of the conditions and actions, and they are the minimum number of test cases needed to cover the full decision table.
NEW QUESTION # 36
For each test case to be executed, the following table specifies its dependencies and the required configuration of the test environment for running such test case:
Assume that CONF1 is the initial configuration of the test environment. Based on this assumption, which of the following is a test execution schedule that is compatible with the specified dependencies and allows minimizing the number of switches between the different configurations of the test environment?
- A. TC4, TC3, TC2, TC1.TC5
- B. TC4, TC3. TC2, TC5, TC1
- C. TC1.TC5.TC4. TC3, TC2
- D. TC4.TC1, TC5. TC2.TC3
Answer: A
Explanation:
To determine the correct execution order that minimizes the number of configuration switches and respects the dependencies, we need to consider the following:
* Initial Configuration: CONF1.
* Dependencies:
* TC1 depends on nothing.
* TC2 depends on TC4.
* TC3 depends on TC4.
* TC4 depends on nothing.
* TC5 depends on TC1.
* Configuration Requirements:
* TC1 requires CONF2.
* TC2 requires CONF2.
* TC3 requires CONF1.
* TC4 requires CONF1.
* TC5 requires CONF2.
Given the initial configuration is CONF1, start with test cases that can run on CONF1 and respect the dependencies. Then switch to CONF2 only when necessary. The optimal order to minimize configuration switches is:
* Start with TC4 (no dependencies, CONF1).
* Continue with TC3 (depends on TC4, CONF1).
* Switch to CONF2.
* Execute TC2 (depends on TC4, CONF2).
* Continue with TC1 (no dependencies, CONF2).
* Finally, execute TC5 (depends on TC1, CONF2).
Therefore, the correct order is:
* TC4 (CONF1)
* TC3 (CONF1)
* TC2 (CONF2)
* TC1 (CONF2)
* TC5 (CONF2)
Thus, the answer is A. TC4, TC3, TC2, TC1, TC5.
NEW QUESTION # 37
Consider the following user story about the authentication functionality of an e-commerce website:
"As a logged-in user, I want to change my current password with a new one, so that I can make my account safer".
The following are some of the acceptance criteria defined for the user story:
[a] After the logged-in user has successfully changed his password, an email confirming the change must be sent to him
[b] To successfully change the password, the logged-in user must enter the current password, enter a new valid password, and finally confirm by pressing the 'Change Password' button
[c] To be valid, the new password entered by the logged-in user is not only required to meet the criteria related to the length and type of characters, but must also be different form the last 5 passwords of that user
[d] A dedicated error message must be presented to the logged-in user when he enters a wrong current password
[e] A dedicated error message must be presented to the logged-in user when he enters the correct current password, but enters an invalid password Based only on the given information, which of the following ATDD tests is most likely to be written first?
- A. The logged-in user enters the correct current password, enters an invalid password, and finally views the dedicated error
- B. The logged-in user enters a wrong current password and views the dedicated error message
- C. The logged-in user submits a purchase order containing ten items, selects to pay with a Visa credit card, enters credit card information of a valid card, presses the 'Confirm' button, and finally views the dedicated message confirming that the purchase has been successful
- D. The logged-in user enters the correct current password, enters a valid new password (different from the last 5 passwords), presses the Change Password' button, and finally receives the e-mail confirming that the password has been successfully changed
Answer: D
Explanation:
ATDD stands for Acceptance Test-Driven Development, which is a collaborative approach to software development and testing, in which the acceptance criteria of a user story are defined and automated as executable tests before the implementation of the software system. ATDD tests are usually written in a Given-When-Then format, which describes the preconditions, the actions, and the expected outcomes of a test scenario. ATDD tests are intended to verify that the software system meets the expectations and the needs of the users and the stakeholders, as well as to provide feedback and guidance for the developers and the testers. Based on the given information, the ATDD test that is most likely to be written first is the one that corresponds to option B, which is:
Given the logged-in user is on the Change Password page When the user enters the correct current password, enters a valid new password (different from the last 5 passwords), and presses the Change Password button Then the user receives an email confirming that the password has been successfully changed This ATDD test is most likely to be written first, because it covers the main functionality and the happy path of the user story, as well as the most important acceptance criterion [a]. It also verifies that the user can change the password with a valid new password that meets the criteria related to the length, the type of characters, and the history of the passwords, as specified in the acceptance criterion [c]. The other options are not likely to be written first, because they either cover less critical or less frequent scenarios, such as entering a wrong current password [d] or an invalid new password [e], or they are not related to the user story or the acceptance criteria at all, such as submitting a purchase order [d]. Reference: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:
ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 1.3.1, Testing in Software Development Lifecycles1 ISTQB® Glossary of Testing Terms v4.0, Acceptance Test-Driven Development, User Story, Acceptance Criterion, Given-When-Then2
NEW QUESTION # 38
Which of the following examples represents System Integration testing?
- A. Testing an application in development environment which is similar to the production environment
- B. Testing if e-commerce website works correctly with a third-party payment gateway
- C. Testing the system based on specifications using simulator for a sub-system
- D. Testing an application's behaviour to check if it fulfils business needs
Answer: B
Explanation:
System Integration Testing (SIT) involves testing the interactions between different systems or components.
Testing an e-commerce website's integration with a third-party payment gateway is an example of SIT, as it checks the correct functioning of the integrated systems. This ensures that the e-commerce platform can successfully interact with external systems to process payments.
References:
* ISTQB CTFL Syllabus V4.0, Section 2.2.2 on system integration testing.
NEW QUESTION # 39
An application is subjected to a constant load for an extended period of time as part of a performance test.
While running this test, the response time of the application steadily slows down, which results in a requirement not being met. This slowdown is caused by a memory leak where the application code does not properly release some of the dynamically allocated memory when it is no longer needed.
Which of the following statements is true?
- A. The slowdown is an error the memory leak is a defect
- B. The slowdown is a defect the memory leak is a failure
- C. The slowdown is a failure while the memory leak is a defect
- D. The slowdown is a defect while the memory leak is an error
Answer: C
Explanation:
In the ISTQB terminology:
* A defect (also known as a bug or fault) is an issue in the code that can cause a failure.
* A failure is the observable incorrect behavior or output of the software due to a defect.
In this scenario, the memory leak is the defect in the application code that causes the application not to release dynamically allocated memory properly. The observable effect of this defect, which is the slowdown in response time, is considered a failure because it is the manifestation of the defect that prevents the application from meeting its performance requirements.
NEW QUESTION # 40
Consider the following examples of risks identified in different software development projects:
[I]. It may not be possible to generate the expected workloads to run performance tests, due to the poor hardware equipment of the machines (load injectors) that should generate these workloads
[II]. A user's session on a web application is not invalidated after a certain period of inactivity (configured by the system administrator) of the user
[III]. The test team will not have an adequate requirements specification (since many requirements will still be missing) by the time test design and analysis activities should begin according to the test plan
[IV]. Following a failure, the system is unable to continue to maintain its pre-failure operation and some data becomes corrupted Which of the following statements is true?
- A. [I], and [IV] are product risks: [II] and [III] are project risks
- B. [II] and [IV] are product risks: [I] and [III] are project risks
- C. [I], [II] and [III] are product risks; [IV] is a project risk
- D. [II] and [III] are product risks, [I] and [IV] are project risks
Answer: B
Explanation:
Product Risks: Relate to the quality of the software product itself, such as functionality, performance, security, and user experience.
* II: A session management issue affects the product's security and functionality.
* IV: Inability to maintain operation and data corruption directly affects the product's reliability and data integrity.
Project Risks: Relate to the circumstances and activities within the project, such as schedule, resources, and planning.
* I: Poor hardware equipment for performance testing impacts the project's ability to conduct performance tests.
* III: Inadequate requirement specifications affect the project timeline and the ability to design tests.
NEW QUESTION # 41
Which of the following statements about the test pyramid is true?
- A. The higher the layer of the test pyramid, the more production code a single automated test within the layer tends tocover
- B. The higher the layer of the test pyramid, the more isolated a single automated test within the layer tends to be
- C. Each layer of the test pyramid groups tests related to a single non-functional quality characteristic
- D. The higher the layer of the test pyramid, the more maintainable a single automated test within the layer tends to be
Answer: A
Explanation:
The test pyramid is a concept that illustrates the different levels of testing and their relative quantities. The pyramid suggests that there should be more low-level unit tests than high-level end-to-end tests. As you move up the pyramid, the scope of each test increases, meaning each higher level test typically covers more of the production code.
* Unit Tests: Form the base of the pyramid and cover individual units of code. They are numerous because they are quick to write and execute.
* Service/Integration Tests: Sit in the middle of the pyramid and cover interactions between integrated units or services.
* UI/End-to-End Tests: At the top of the pyramid, these tests cover entire workflows and user interactions, making them fewer in number due to their complexity and execution time.
Option B accurately describes that the higher the layer of the test pyramid, the more production code a single automated test tends to cover because these higher-level tests involve broader functionalities and interactions compared to unit tests.
NEW QUESTION # 42
Which of the following is a typical potential risk of using test automation tools?
- A. Reduced test execution times compared to manual testing
- B. Reduced repeatability and consistency of tests compared to manual testing
- C. Reduced feedback times regarding software quality compared to manual testing
- D. Underestimation of effort required to maintain test scripts
Answer: D
Explanation:
One of the typical potential risks associated with using test automation tools is the underestimation of the effort required to maintain test scripts. While test automation can reduce test execution times and provide more consistent and repeatable tests compared to manual testing, maintaining test scripts can be labor-intensive and often requires significant effort. Changes in the application under test can lead to frequent updates in the test scripts to keep them functional and relevant.
References:
* ISTQB CTFL Syllabus V4.0, Section 6.2 on the benefits and risks of test automation tools
* The syllabus outlines that while automation can improve efficiency, it also introduces maintenance challenges.
NEW QUESTION # 43
Consider a given test plan which, among others, contains the following three sections: "Test Scope", "Testing Communication", and "Stakeholders". The features of the test object to be tested and those excluded from the testing represent information that is:
- A. usually included in a test plan and, in the given test plan, it is more likely to be specified within "Test Scope" rather than in the other two sections mentioned
- B. usually included in a test plan and, in the given test plan, it is more likely to be specified within
"Stakeholders" rather than in the other two sections mentioned - C. usually included in a test plan and, in the given test plan, it is more likely to be specified within "Testing Communication" rather than in the other two sections mentioned
- D. not usually included in a test plan, and therefore in the given test plan it should not be specified neither within the three sections mentioned, nor within the others
Answer: A
Explanation:
The features of the test object to be tested and those excluded from the testing represent information that is usually included in a test plan and, in the given test plan, it is more likely to be specified within "Test Scope" rather than in the other two sections mentioned. The test scope defines the boundaries and limitations of the testing activities, such as the test items, the features to be tested, the features not to be tested, the test objectives, the test environment, the test resources, the test assumptions, the test risks, etc. The test scope helps to establish a common understanding of what is included and excluded from the testing, and to avoid ambiguity, confusion, or misunderstanding among the stakeholders. The other two sections, "Testing Communication" and "Stakeholders", are also important parts of a test plan, but they do not directly address the features of the test object. The testing communication describes the methods, frequency, and responsibilities for the communication and reporting of the testing progress, status, issues, and results. The stakeholders identify the roles and responsibilities of the people involved in or affected by the testing activities, such as the test manager, the test team, the project manager, the developers, the customers, the users, etc. References: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:
* ISTQB Certified Tester Foundation Level Syllabus v4.0, Chapter 2.1.1, Test Planning1
* ISTQB Glossary of Testing Terms v4.0, Test Plan, Test Scope2
NEW QUESTION # 44
Which of the following is a task the Author is responsible for, as part of a typical formal review?
- A. Identifying potential anomalies in the work product under review
- B. Fixing the anomalies found in the work product under review
- C. Recording the anomalies found during the review meeting
- D. Determining the people who will be involved in the review
Answer: A
Explanation:
This answer is correct because identifying potential anomalies in the work product under review is one of the tasks the Author is responsible for, as part of a typical formal review. The Author is the person who creates the work product to be reviewed, such as a requirement specification, a design document, or a test case. The Author's tasks include preparing the work product for the review, identifying potential anomalies in the work product, and fixing the anomalies found in the work product after the review. Reference: ISTQB Glossary of Testing Terms v4.0, ISTQB Foundation Level Syllabus v4.0, Section 2.4.2.1
NEW QUESTION # 45
Which of the following statements about statement coverage is true?
- A. Achieving 100% statement coverage ensures that 100% branch coverage is achieved
- B. Achieving 80% statement coverage ensures that 80% of all executable statements within the code have been exercised
- C. Achieving 100% statement coverage ensures that no variable within the code has been used without being initialized
- D. Achieving 90% statement coverage ensures that 90% branch coverage is achieved
Answer: B
Explanation:
Statement coverage, also known as line coverage, is a metric used in white-box testing to measure the percentage of executable statements in the source code that have been executed by the test suite. Achieving a certain percentage of statement coverage means that an equivalent percentage of the executable statements in the code have been executed during testing.
For example, achieving 80% statement coverage indicates that 80% of the lines of code have been run through during the testing process. This metric helps in identifying parts of the code that have not been tested and may contain undetected defects.
It's important to note that achieving high statement coverage does not necessarily guarantee that all possible paths or scenarios within the code are tested, nor does it ensure the detection of all types of defects. Other coverage metrics, such as branch coverage or condition coverage, might also be necessary to achieve a more thorough testing process.
References:
* The official ISTQB CTFL syllabus clearly defines statement coverage and explains that it ensures that the corresponding percentage of all executable statements have been tested.
NEW QUESTION # 46
Which of the following about typical information found within a test plan is false?
- A. The conditions that must be met for part of all the planned activities to be suspended and resumed
- B. The conditions that must be met in order for the test execution activities to be considered completed
- C. The list of the product risks which have not been fully mitigated at the end of test execution
- D. The need to temporarily have additional test personnel available for specific test phases and/or test activities
Answer: C
Explanation:
A test plan is a document detailing the objectives, resources, schedule, and scope of testing activities. It also outlines the test strategy, environment, tools, and criteria for test completion and suspension.
* Option A: Correct as it indicates resource planning which is a crucial part of a test plan.
* Option B: Correct as it describes exit criteria which are essential for test completion.
* Option C: Incorrect because a test plan typically addresses known risks and mitigation strategies but does not list unmitigated risks post-test execution.
* Option D: Correct as it mentions suspension criteria which are also a part of a test plan.
Therefore, option C is false as it does not reflect the typical information found within a test plan.
NEW QUESTION # 47
Which of the following is a test-first approach, where tests that express a shared understanding from stakeholders of how the application is expected to work, are first written in business-readable language (following the Given/When/Then format), and then made executable to drive development?
- A. Behavior-Driven Development (BDD)
- B. Acceptance Test-Driven Development (ATDD)
- C. Domain-Driven Design (DDD)
- D. Test-Driven Development (TDD)
Answer: A
Explanation:
This answer is correct because Behavior-Driven Development (BDD) is a test-first approach, where tests that express a shared understanding from stakeholders of how the application is expected to work, are first written in business-readable language (following the Given/When/Then format), and then made executable to drive development. BDD is a collaborative approach that involves testers, developers, business analysts, product owners, and other stakeholders in defining the expected behavior of the application using scenarios that describe the preconditions, actions, and outcomes of the application. BDD scenarios are written using a domain-specific language (DSL) that can be translated into executable test cases using tools such as Cucumber or SpecFlow. BDD aims to improve communication, collaboration, and feedback among the team members, and to deliver software that meets the customer's needs and expectations. References: ISTQB Glossary of Testing Terms v4.0, ISTQB Foundation Level Syllabus v4.0, Section 3.1.1.4
NEW QUESTION # 48
Which of the following is a task the Author is responsible for, as part of a typical formal review?
- A. Identifying potential anomalies in the work product under review
- B. Fixing the anomalies found in the work product under review
- C. Recording the anomalies found during the review meeting
- D. Determining the people who will be involved in the review
Answer: A
Explanation:
Explanation
This answer is correct because identifying potential anomalies in the work product under review is one of the tasks the Author is responsible for, as part of a typical formal review. The Author is the person who creates the work product to be reviewed, such as a requirement specification, a design document, or a test case. The Author's tasks include preparing the work product for the review, identifying potential anomalies in the work product, and fixing the anomalies found in the work product after the review. References: ISTQB Glossary of Testing Terms v4.0, ISTQB Foundation Level Syllabus v4.0, Section 2.4.2.1
NEW QUESTION # 49
Which of the following statements best describes how configuration management supports testing?
- A. 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
- B. 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'
- C. 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
- D. 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
Answer: C
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 # 50
Which of the following statements about white-box test techniques is true?
- A. Code-related white-box test techniques provide an objective measure of coverage and can be used to complement black-box test techniques to increase confidence in the code
- B. Code-related white-box test techniques are not required to measure the actual code coverage achieved by black-box testing, as code coverage can be measured using the coverage criteria associated with black-box test techniques
- C. Branch coverage is the most thorough code-related white-box test technique, and therefore applicable standards prescribe achieving full branch coverage at the highest safety levels for safety-critical systems
- D. Achieving full statement coverage and full branch coverage for a software product means that such software product has been fully tested and there are no remaining bugs within the code
Answer: A
Explanation:
This answer is correct because code-related white-box test techniques are test design techniques that use the structure of the code to derive test cases. They provide an objective measure of coverage, such as statement coverage, branch coverage, or path coverage, which indicate how much of the code has been exercised by the test cases. Code-related white-box test techniques can be used to complement black-box test techniques, which are test design techniques that use the functional or non-functional requirements of the system or component to derive test cases. By combining both types of techniques, testers can increase their confidence in the code and find more defects. References: ISTQB Glossary of Testing Terms v4.0, ISTQB Foundation Level Syllabus v4.0, Section 2.3.2.2
NEW QUESTION # 51
A document describes the test procedures that have been derived for the identified test sets. Among other things, the order in which the test cases in the corresponding test set are to be executed according to the dependencies described by preconditions and postconditions is specified. This document is a typical work product produced as part of:
- A. test monitoring and control
- B. test analysis
- C. test design
- D. test implementation
Answer: D
Explanation:
The document that describes the test procedures, including the order in which test cases are to be executed according to dependencies described by preconditions and postconditions, is typically produced during the test implementation phase. During this phase, detailed test procedures and scripts are developed, organized, and prioritized for execution. The main goal of test implementation is to ensure that all test cases are prepared and structured in a way that supports efficient and effective test execution.
References:
* ISTQB CTFL Syllabus 4.0, Chapter 5.1.6, page 49: Test Implementation
NEW QUESTION # 52
Which of the following statements is CORRECT about White-box testing?
- A. White-box testing helps find defects even when specifications are vague because it takes into account the code.
- B. White-box testing helps find defects because it provides for requirements based coverage
- C. White-box testing helps find defects because it focuses on defects rather than failures
- D. White-box testing helps find defects because they can be used to measure statement coverage
Answer: D
Explanation:
White-box testing, also known as structural testing, involves testing the internal structures or workings of an application, as opposed to its functionality (which is tested by black-box testing). The correct statement about white-box testing is that it helps find defects by measuring aspects such as statement coverage.
* Statement Coverage: White-box testing techniques like statement coverage measure whether each statement in the code has been executed at least once. This helps ensure that all parts of the code are tested and can reveal defects in areas that might not be reached by black-box testing alone.
Other statements are less accurate in the context of white-box testing:
* Specifications being vague: White-box testing is code-focused, not requirement-focused. If specifications are vague, it affects both white-box and black-box testing. The main advantage of white-box testing is that it allows testers to create tests based on the code's structure and logic.
* Requirements-based coverage: This is typically associated with black-box testing, which derives tests from specifications and requirements. White-box testing, on the other hand, derives tests from the code itself.
* Focus on defects rather than failures: Both white-box and black-box testing aim to identify defects, but white-box testing does this through code coverage and examining the code paths directly. It does not focus exclusively on defects rather than failures; it is just another method to identify potential issues.
NEW QUESTION # 53
Which of the following statements is true?
- A. A defect may cause a failure which, when occurring, always causes an error
- B. Failures can be caused by defects, but also by environmental conditions
- C. A defect does not always produce a failure, while a bug always produces a failure
- D. Bugs are defects found during component testing, while failures are defects found at higher test levels
Answer: B
Explanation:
Failures can be caused by defects, but also by environmental conditions. A failure is an event in which the software system does not perform a required function or performs a function incorrectly, according to the expected behavior. A defect is a flaw in the software system or a deviation from the requirements or the specifications, that may cause a failure. However, not all failures are caused by defects, as some failures may be caused by environmental conditions, such as hardware malfunctions, network interruptions, power outages, incompatible configurations, etc. Environmental conditions are factors that affect the operation of the software system, but are not part of the software system itself. The other statements are false, because:
* A defect does not always produce a failure, while a bug always produces a failure. This statement is false, because a defect may or may not produce a failure, depending on the inputs, the outputs, the states, or the scenarios of the software system, and a bug is just another term for a defect, so it has the
* same possibility of producing a failure as a defect. For example, a defect in a rarely used feature or a hidden branch of the code may never produce a failure, while a defect in a frequently used feature or a critical path of the code may produce a failure often. A bug is not a different concept from a defect, but rather a synonym or a colloquial term for a defect, so it has the same definition and implications as a defect.
* A defect may cause a failure which, when occurring, always causes an error. This statement is false, because an error is not a consequence of a failure, but rather a cause of a defect. An error is a human action or a mistake that produces a defect in the software system, such as a typo, a logic flaw, a requirement misunderstanding, etc. An error is not observable in the software system, but rather in the human mind or the human work products, such as the code, the design, the documentation, etc. A failure is not a cause of an error, but rather a result of a defect, which is a result of an error. For example, an error in the code may cause a defect in the software system, which may cause a failure in the software behavior.
* Bugs are defects found during component testing, while failures are defects found at higher test levels.
This statement is false, because bugs and failures are not different types of defects, but rather different terms for defects and their manifestations. As mentioned before, bugs are just another word for defects, and failures are the events in which the software system does not perform as expected due to defects.
Bugs and failures can be found at any test level, not only at component testing or higher test levels. Test levels are the stages of testing that correspond to the levels of integration of the software system, such as component testing, integration testing, system testing, and acceptance testing. Defects and failures can occur and be detected at any test level, depending on the test objectives, the test basis, the test techniques, and the test environment. References: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:
* ISTQB Certified Tester Foundation Level Syllabus v4.0, Chapter 1.1.2, Testing and Quality1
* ISTQB Certified Tester Foundation Level Syllabus v4.0, Chapter 1.2.1, Testing Principles1
* ISTQB Certified Tester Foundation Level Syllabus v4.0, Chapter 1.3.1, Testing in Software Development Lifecycles1
* ISTQB Glossary of Testing Terms v4.0, Failure, Defect, Bug, Environmental Condition, Error, Test Level2
NEW QUESTION # 54
Which sequence of stated in the answer choices is correct in accordance with the following figure depicting the life-cycle of a defect?
- A. S0->S1->S2~>S3->S4
- B. S0->S1->S2->S3->S5->S1
- C. S0->S1 ->S2->S3->S5->S3->S4
- D. S0->S1->S2->S3->S5->S1->S2->S3
Answer: C
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.
NEW QUESTION # 55
Which of the following statements about estimation of the test effort is WRONG?
- A. Effort estimate depends on the budget of the project.
- B. Experience based estimation is one of the estimation techniques.
- C. Once the test effort is estimated, resources can be identified and a schedule can be drawn up.
- D. Effort estimate can be inaccurate because the quality of the product under tests is not known.
Answer: A
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 # 56
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