Pearson ISTQB-CTAL-TA New Attempt

The comment that should be made about the Supercar specification is that boundaries for stock levels are ambiguous. The specification states that the site will allow an order to be processed if at least one of the chosen vehicle configurations is in stock, but it does not define what constitutes “in stock” or how many units are available for each configuration. This makes the specification unclear and inconsistent, as it does not provide enough information for testing or implementation. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 2.3.1, page 23.

The best black-box test technique to test the processing functionality of this system is equivalence partitioning enhanced with boundary value analysis. Equivalence partitioning is a technique that divides the input domain into subdomains that are expected to behave similarly. Boundary value analysis is a technique that tests the values at or near the boundaries of an input domain. These techniques are suitable for testing a system that depends on defined ranges of input variables, as they can ensure that all subdomains and boundary values are covered by test cases. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.2.1, page 33 and Section 3.2.2, page 35.

Comprehensive and Detailed in Depth Explanation:

Decision Table Analysis:

Age:Valid ranges (18-69), excludes those aged ≥70 or <18 (2 valid values).

Alcohol Consumption:≤14 units, >14 units (2 values).

Smoking Status:Smoker, Non-smoker (2 values).

Employment Status:Full-time, Not full-time (2 values).

After removinginfeasible combinations(like age <18 or ≥70), the possible combinations are reduced.

2 (age) x 2 (alcohol) x 2 (smoker) x 2 (employment) = 16possible combinations.

However, some combinations are logicallycollapsedor omitted, as irrelevant conditions are not covered.

After this collapsing, the total number ofnecessary test casesis8.

Therefore, the correct answer isB (8).

Classification trees support the application of pairwise testing in the following ways:

a. They help to identify inputs to be used by the pairwise test technique - This is true because classification trees show the classes and subclasses of inputs for a given scenario in a graphical way.

b. They show the combinations needed to cover all-pairs - This is true because classification trees can be used to generate the combinations of inputs that cover all pairs using a mathematical algorithm.

c. They help to identify particular combinations of interest - This is true because classification trees can be used to highlight or prioritize certain combinations of inputs that are more relevant or important for the scenario.

d. They show both typical and atypical behavior - This is false because classification trees do not show the behavior or the expected results of the system under test, only the inputs and outputs.

e. They show the expected results for the various test cases - This is false because classification trees do not show the expected results or the verification criteria for the test cases, only the inputs and outputs. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.5.2, page 42.