iSQI CTFL_Syll_4.0 Exam Dumps - Valid Questions Answers

The absence-of-errors fallacy is one of the seven testing principles mentioned in the ISTQB syllabus. This principle states that even if no defects are found in the software, it does not guarantee that the software is usable and meets the user needs and expectations. By involving users early in the development process through practices like prototyping, the team can gather feedback to ensure that the software aligns with user expectations, thereby addressing the risk of this fallacy.

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.

The problem described involves a software implementation error in a decision statement for calculating a bonus based on the Total Amount of Sales (TAS). The requirement states that if TAS is 300,000€ or more, a bonus should be paid. However, the software incorrectly implements this with "IF (TAS = 300000)" instead of "IF (TAS >= 300000)".

Applying Boundary Value Analysis (BVA) to this situation involves selecting test cases at the boundaries of the input domain, including just below, at, and just above the boundary conditions.

Test Case TC1 = 299999:

This value is just below the boundary (300,000).

Expected Result: No bonus should be paid.

Actual Result: No bonus paid.

TC1does not highlight the fault because the implemented condition "IF (TAS = 300000)" and the correct condition "IF (TAS >= 300000)" both yield the same result (no bonus).

Test Case TC2 = 300000:

This value is exactly at the boundary.

Expected Result: Bonus should be paid.

Actual Result: Bonus paid.

TC2does not highlight the fault because the implemented condition "IF (TAS = 300000)" and the correct condition "IF (TAS >= 300000)" both yield the same result (bonus paid).

Test Case TC3 = 300001:

This value is just above the boundary.

Expected Result: Bonus should be paid.

Actual Result: No bonus paid due to the incorrect implementation.

TC3highlights the fault because the implemented condition "IF (TAS = 300000)" fails to pay the bonus, whereas the correct condition "IF (TAS >= 300000)" would pay the bonus.

BVA focuses on the edges of input ranges where errors are more likely.

The critical values are just below, at, and just above the boundary.

Boundary Value Analysis (BVA):Verification:According to the ISTQB CTFL syllabus, BVA is an essential technique for identifying potential errors at the boundaries of input ranges. This is because developers are more likely to make mistakes at these extremes​​.

Therefore,TC3 (300001)is the test case that would highlight the fault in the software's implementation of the decision condition.