CTFL4 Free Practice Test

Can "cost" be regarded as Exit criteria?

1. A. Ye
2. B. Spending too much money on test ng will result in an unprofitable product, andhaving cost as an exit criterion helps avoid this
3. C. N
4. D. The financial value of product quality cannot be estimated, so it is incorrect to use cost as an exit criterion
5. E. Ye
6. F. Going by cost as an exit criterion constrains the testing project which will hello achieve the desired quality level defined for the project
7. G. No The cost of testing cannot be measured effectively, so it is incorrect to use cost as an exit criterion

Correct Answer: A
Cost can be regarded as an exit criterion for testing, because it is a factor that affects the profitability and feasibility of the software product. Testing is an investment that aims to improve the quality and reliability of the software product, but it also consumes resources, such as time, money, and human effort. Therefore, testing should be planned and executed in a way that balances the cost and benefit of testing activities. Having cost as an exit criterion helps to avoid spending too much money on testing, which mayresult in an unprofitable product or a loss of competitive advantage. Cost can also help to prioritize and focus the testing efforts on the most critical and valuable features and functions of the software product. However, cost should not be the only exit criterion for testing, as it may not reflect the true quality and risk level of the software product. Other exit criteria, such as defect rate, test coverage, user satisfaction, etc., should also be considered and defined in the test plan.
The other options are incorrect, because they either deny the importance of cost as an exit criterion, or they make false or unrealistic assumptions about the cost of testing. Option B is incorrect, because the financial value of product quality can be estimated, for example, by using cost-benefit analysis, return on investment, or cost of quality models. Option C is incorrect, because going by cost as an exit criterion does not necessarily constrain the testing project or help achieve the desired quality level. Cost is a relative and variable factor that depends on the scope, complexity, and context of the software product and the testing project. Option D is incorrect, because the cost of testing can be measured effectively, for example, by using metrics, such as test effort, test resources, test tools, test environment, etc.

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

1. A. S0->S1->S2->S3->S5->S1
2. B. S0->S1->S2->S3->S5->S1->S2->S3
3. C. S0->S1->S2~>S3->S4
4. D. S0->S1 ->S2->S3->S5->S3->S4

Correct Answer: D
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 withS0 (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). References: ISTQB Certified Tester Foundation Level (CTFL) v4.0 Syllabus, Section 1.4.3, Page 17.

From a testing perspective, configuration management

1. A. Allows the expected results to be compared with the actual results.
2. B. Allows the tracking of all changes to versions of the testware.
3. C. Includes all activities that direct and control an organisation with regard to quality
4. D. Focuses on configuring static analysis tools to choose the most suitable breadth and depth of analysis.

Correct Answer: B
Configuration management in the context of testing involves the systematic control of changes to the configuration items, including testware such as test scripts, test data, and test environments. It ensures that all changes are tracked and recorded, enabling the version control and management of testware .
Option A is related to test execution rather than configuration management. Option C describes quality management in a broader sense, not specifically configuration management. Option D is specific to the configuration of tools, not the overall management of testware versions.

Which of the following statements about statement coverage is TRUE?

1. A. Achieving 90% statement coverage ensures that 90% branch coverage is achieved.
2. B. Achieving 100% statement coverage ensures that no variable within the code has been used without being initialised.
3. C. Achieving 100% statement coverage ensures that 100% branch coverage is achieved
4. D. Achieving 80% statement coverage ensures that 80% of all executable statements within the code have been exercised.

Correct Answer: D
Statement coverage measures the percentage of executable statements that have been exercised by a test suite. Achieving 80% statement coverage means that 80% of the executable code lines have been tested. This metric helps in understanding how much of the code has been covered during testing. However, it does not guarantee branch coverage, variable initialization, or detection of all possible defects. The ISTQB CTFL Syllabus v4.0 explains statement coverage as a measure of the extent to which the code has been tested, without implying other types of coverage or testing goals.

Which of the following issues cannot be identified by static analysis tools?

1. A. Very low MTBF (Mean Time Between failure)
2. B. Potentially endless loops
3. C. Referencing a variable with an undefined value
4. D. Security vulnerabilities

Correct Answer: A
Static analysis tools are software tools that examine the source code of a program without executing it. They can detect various types of issues, such as syntax errors, coding standardsviolations, security vulnerabilities, and potential bugs12. However, static analysis tools cannot identify issues that depend on the runtime behavior or performance of the program, such as very low MTBF (Mean Time Between failure)3. MTBF is a measure of the reliability of a system or component. It is calculated by dividing the total operating time by the number of failures. MTBF reflects how often a system or component fails during its expected lifetime. Static analysis tools cannot measure MTBF because they do not run the program or observe its failures. MTBF can only be estimated by dynamic testing, which involves executing the program under various conditions and collecting data on its failures4. Therefore, very low MTBF is an issue that cannot be identified by static analysis tools. The other options, such as potentially endless loops, referencing a variable with an undefined value, and security vulnerabilities, are issues that can be identified by static analysis tools. Static analysis tools can detect potentially endless loops by analyzing the control flow and data flow of the program and checking for conditions that may never become false5. Static analysis tools can detect referencing a variable with an undefined value by checking the scope and initialization of variables and reporting any use of uninitialized variables6. Static analysis tools can detect security vulnerabilities by checking for common patterns of insecure code, such as buffer overflows, SQL injections, cross-site scripting, and weak encryption. References = What Is Static Analysis? Static Code Analysis Tools - Perforce Software, How Static Code Analysis Works | Perforce, Static CodeAnalysis: Techniques, Top 5 Benefits & 3 Challenges, What is MTBF? Mean Time Between Failures Explained | Perforce, Static analysis tools - Software Testing MCQs - CareerRide, ISTQB_Chapter3 | Quizizz, [Static Code Analysis for Security Vulnerabilities | Perforce].