iSQI CTFL_Syll_4.0 Exam With Confidence Using Practice Dumps

Experience-based testing techniques are adopted for several reasons, most importantly because they can identify defects that might be missed by more systematic approaches like black-box and white-box testing. While systematic techniques follow predefined procedures and cover specific criteria, experience-based techniques leverage the tester's knowledge, intuition, and experience, which can be especially effective in uncovering subtle and complex issues.

Experience-based testing techniques include methods such as error guessing and exploratory testing. These methods rely on the tester’s background and intuition to predict where defects might be located and how the system might fail. These techniques are particularly useful in situations where the requirements and specifications are incomplete or ambiguous, and where creative and ad-hoc approaches can provide significant value.

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The official ISTQB® CTFL syllabus emphasizes that experience-based techniques can find defects that more systematic techniques might miss, which makes them valuable complements to other testing methods​​.

Exercising at least one of the decision outcomes for all decisions within the code, ensures achieving full branch coverage, which is a test coverage criterion that requires that all branches in the control flow of the code are executed at least once by the test cases. A branch is a basic block of code that has a single entry point and a single exit point, and a decision is a point in the code where the control flow can take more than one direction, such as an if-then-else statement, a switch-case statement, a loop statement, etc. The decision outcomes are the possible paths that can be taken from a decision, such as the then branch or the else branch, the case branch or the default branch, the loop body or the loop exit, etc. The other statements are false, because:

The minimum number of test cases needed to achieve full branch coverage, is usually higher than that needed to achieve full statement coverage, which is a test coverage criterion that requires that all executable statements in the code are executed at least once by the test cases. This is because branch coverage is a stronger criterion than statement coverage, as it implies statement coverage, but not vice versa. For example, a single test case can achieve full statement coverage for an if-then-else statement, but two test cases are needed to achieve full branch coverage, as both the then branch and the else branch need to be exercised.

If full branch coverage has been achieved, then all unconditional branches within the code have not necessarily been exercised, as unconditional branches are branches that do not depend on any decision, and are always executed, such as a goto statement, a break statement, a return statement, etc. Unconditional branches are not part of the branch coverage criterion, as they do not represent different paths in the control flow of the code. However, they are part of the statement coverage criterion, as they are executable statements in the code.

If full branch coverage has been achieved, then all combinations of conditions in a decision table have not necessarily been exercised, as a decision table is a test design technique that represents the logical relationships between multiple conditions and their corresponding actions, in a tabular format. A decision table can have more combinations of conditions than the number of decision outcomes in the code, as each condition can have two or more possible values, such as true or false, yes or no, etc. For example, a decision table with four conditions can have 16 combinations of conditions, but the corresponding code may have only two decision outcomes, such as pass or fail. To exercise all combinations of conditions in a decision table, a stronger test coverage criterion is needed, such as condition combination coverage, which requires that all possible combinations of condition outcomes in the code are executed at least once by the test cases. References: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:

ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 2.3.1, Test Coverage Criteria Based on the Structure of the Software

ISTQB® Glossary of Testing Terms v4.0, Branch Coverage, Statement Coverage, Branch, Decision, Decision Outcome, Unconditional Branch, Decision Table, Condition Combination Coverage

Good testing practices that apply to all software development lifecycles include having specific test objectives for each test level that align with the phase of the software development lifecycle and the type of activities being addressed. This approach ensures that testing activities are relevant and appropriate for the specific stage of development, enhancing the effectiveness and efficiency of the testing process.

References:

ISTQB® CTFL Syllabus 4.0, Chapter 2.1.2, page 24: Software Development Lifecycle and Good Testing Practices​