CTAL-TA_Syll2019 Exam Dumps : ISTQB Certified Tester Advanced Level - Test Analyst (Syllabus 2019)

Classification trees are a combinatorial testing technique that allows the tester to represent the data items and their values in a graphical form, and to exclude certain combinations by using constraints or rules. Classification trees can help the tester to visualize and organize the test data, and to generate test cases that cover all relevant combinations of values. The other techniques do not provide a convenient way to exclude certain combinations, or require more complex mathematical calculations. References =

• ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst1, page 2
• Classification Tree Method for Test Design2, section “Classification Tree Method”
• Classification Tree Method - Tutorialspoint3, section “Classification Tree Method”

The use case only describes the normal or happy path scenario, where the user performs a successful cash withdrawal. However, it does not consider any alternative or exceptional scenarios, such as invalid card, incorrect PIN, insufficient balance, network failure, etc. These scenarios are important to test the robustness and reliability of the ATM system, and should be included in the use case specification. References = ISTQB Certified Tester Advanced Level Syllabus Test Analyst, Section 2.2.1, Use Case Testing1; ISTQB Advanced Level Test Analyst (CTAL) Exam Study Guide, Section 2.2.1, Use Case Testing2

Defect taxonomies are categorized lists of defects that can be used to identify and prevent common types of errors in software development and testing. They can also be used to design test cases that target specific defect types, such as security vulnerabilities. Therefore, using a list of known defect types to penetrate the security of computer systems is an example of the use of defect taxonomies. References = Defect Taxonomies - The Practical Guide to Defect Prevention (Chapter 10), Using Defect Taxonomies for Testing Requirements, Defect Based Approach using Defect Taxonomy, Requirements-based testing with defect taxonomies