iSQI Updated CTAL-TA_Syll2019 Exam Questions and Answers by giorgio

Installability testing is a type of non-functional testing that focuses on verifying that the software can be installed, upgraded, and uninstalled without errors or interruptions1. It is usually performed by a technical test analyst who has knowledge of the installation requirements, dependencies, and configurations2. The main objectives of installability testing are to ensure that the software is compatible with different platforms, environments, and hardware specifications, and that the installation and de-installation processes are functional, reliable, and secure3. Usability issues, such as the clarity, simplicity, and efficiency of the installation and de-installation user interfaces, are not the primary concern of installability testing, and may be better addressed by other types of testing, such as usability testing or user acceptance testing4. References = Installation testing - Wikipedia; ISTQB Advanced Level Technical Test Analyst Syllabus 2019, section 4.3.2; Mastering Installability Testing: A Key Software Quality Assurance Process; Installation Testing | Complete Overview Of Installation Testing

The test basis is the collection of documents that provide the basis for testing, such as requirements, design documents, user manuals, etc. The test analyst examines the test basis to understand the scope and objectives of testing, as well as the risks and assumptions involved. This task is performed during the test analysis phase, which is the first phase of the test process. References =

• ISTQB Certified Tester Advanced Level Overview of Syllabi1, page 10
• ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst2, page 2
• Test Analysis and Test Design are key for software testing3, section “Test Analysis”

Classification trees are a visual way of identifying test objects and data, and pairwise testing is a technique of generating test cases that cover all possible pairs of values from different classifications. Classification trees support pairwise testing by:

• Helping to identify inputs to be used by the pairwise test technique, as each class represents a possible value for a test parameter.
• Showing the combinations needed to cover all-pairs, as each test case is a selection of one class from each classification.
• Helping to identify particular combinations of interest, as the test engineer can use the tree structure to group or prioritize classes based on their relevance or risk. References = ISTQB Advanced Level Test Analyst Syllabus 2019, section 3.2.3; Smarter Test Design with Classification Trees and Pairwise Techniques, slides 6-12.

A 0-switch test case is a test case that covers one transition from one state to another. To achieve 100% 0-switch coverage, all the transitions in the state table must be tested. There are eight transitions in the state table, as shown by the arrows. Therefore, eight 0-switch test cases are needed. References =

• ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst1, page 2
• How to Design Test Cases Using State Transition Testing Technique?2, section “0-switch coverage”
• 0 and 1 - Switch Coverage in State Transition Testing?3, answer by Marco Filippone