iSQI Updated CTFL_Syll2018 Exam Questions and Answers by noa

The general principles of testing state that testing can show the presence of defects, but not their absence. Running the same test set more often will not increase the likelihood of finding new defects, unless the system or its environment changes. Therefore, statement A contradicts the general principles of testing. Statement B is true, as testing is context-dependent and should be tailored to the specific situation of a project. Statement C is also true, as early testing can help prevent defects and reduce rework. Statement D is true, as it reflects the Pareto principle or the 80/20 rule, which states that most defects are found in a small subset of a system’s modules.

References: ISTQB Certified Tester Foundation Level Syllabus 2018, Section 1.2

Equivalence Partitioning is a black-box test design technique that divides input data of a software module into partitions of equivalent data from which test cases can be derived. In this context, the valid equivalence partitions are:

• Silver Tier: 0 to 400 Credits
• Gold Tier: 401 to 800 Credits
• Platinum Tier: 801 to 1400 Credits
• Concierge Tier: 1401+ Credits

The test cases provided cover all these partitions:

• TC1 covers the Silver Tier boundary at 400 Credits.
• TC2 covers within the Gold Tier at 500 Credits.
• TC3 covers the Gold Tier boundary at 800 Credits.
• TC4 covers within the Concierge Tier at 1500 Credits.

Since all valid partitions are covered by the test cases, 100% of the valid Equivalence Partitions have been achieved.

Incorrect interface specifications are most likely to be found by a review during static testing. A review is a type of static testing technique that involves a manual examination of a work product by one or more individuals who follow a defined process. A review can be applied to any work product, such as requirements specifications, design specifications, code, test cases, test plans, user manuals, etc. A review can help find defects and improve the quality of any work product at any stage of the software development lifecycle. Incorrect interface specifications are defects that affect the definition and communication of the interfaces between components or systems. These defects can be detected by reviewing the interface specifications document and comparing it with the requirements and design specifications.

References: Certified Tester Foundation Level Syllabus, Section 3.2.1

The overall quality of the software can be increased by finding and fixing defects before releasing the software to the customers or users. A test case passes means that no defect was found in the tested functionality, which indicates a high quality. A test case fails, defect gets logged which subsequently gets fixed means that a defect was found and corrected, which improves the quality. Some tests are deferred because test environment is not available means that some functionality was not tested, which may leave some defects undetected, which reduces the quality. A bug is found but there is no corresponding test case means that a defect was found by chance or by other means than planned testing, which does not increase the quality of the testing process or the test coverage.