CTFL_Syll2018 Exam Dumps : ISTQB Certified Tester Foundation Level (Syllabus 2018)

The statement that use case testing is designed to find defects in the process flow is true, because use case testing is a technique that tests the end-to-end user interactions and outcomes based on use cases or scenarios that describe how the software under test should be used . Use case testing can help to find defects in the process flow, such as missing steps, incorrect sequences, or invalid transitions . The other options are not true statements about use case testing. Option A is false, because use case testing is not designed to be used by real users, but rather by professional testers who design and execute test cases based on use cases or scenarios . Option C is false, because use case testing is not designed to find defects in the data flow, but rather in the process flow. Data flow testing is a different technique that tests how data values are defined, used, and modified by the software under test . Option D is false, because use case testing is not always designed by customers or end users, but rather by testers who analyse the requirements or specifications of the software under test to identify use cases or scenarios .

One of the basic principles of testing is that for a software system, it is not possible under normal conditions to test all input and output combinations because they are too many and too complex to cover within a reasonable time and budget. Therefore, testers have to select a subset of inputs and outputs that are representative and relevant for testing based on criteria such as requirements, risks, priorities, etc. This principle implies that testing cannot prove that a software system is defect-free or has a certain level of quality because there might be some untested inputs or outputs that could reveal defects or failures. Testing can only provide information about the quality and risk level of a software system based on the observed behavior and results under certain conditions and assumptions. You can find more information about the basic principles of testing in A Study Guide to the ISTQB® Foundation Level 2018 Syllabus, Chapter 11.

 These are some of the factors that should be considered to determine whether enough testing has been performed. The exit criteria define the specific goals and requirements for testing completion. The budget limits the resources and time available for testing. The product’s risk profile indicates the areas of highest priority and impact for testing. Sufficient details of the system status allow decisions on whether further testing is needed or not. The other options are not relevant factors for determining enough testing.