ISTQB Updated CTFL-Foundation Exam Questions and Answers by esmee

Test independence is beneficial because it helps to avoid author bias, ensuring that the tests are designed and executed objectively. When testers who are not involved in the development of the code test it, they bring a fresh perspective and are more likely to identify defects that the developers might have overlooked due to familiarity with their own work. This principle is supported by the ISTQB CTFL Syllabus, which highlights that independence can enhance the effectiveness of testing by eliminating the preconceived notions and biases of those who wrote the code​​.

Retesting, also known as confirmation testing, involves executing a previously failed test case after the defect has been fixed. The objective is to ensure that the original defect has been successfully removed. This type of testing is critical in verifying that the defect fixes are effective and that the software now operates as expected under the same conditions that previously caused the failure.

Quality in software testing is best defined as conformance to requirements. The ISTQB CTFL syllabus v4.0 states that quality is the degree to which a component, system, or process meets specified requirements and/or user/customer needs and expectations​​.

Test case 1 exercises the decision outcomes True, False, False

Test case 2 exercises the decision outcomes False, True, False

This leaves the True outcome of decision 3 not exercised.

Of the 6 possible decision outcomes, 5 have been exercised, so the decision coverage is 5/6 (about 83%).