Based on the classification tree shown below, using the pairwise testing technique how many test cases are required to test all pairs?

Based on the classification tree shown below, using the pairwise testing technique how many test cases are required to test all pairs?

A . 3
B . 8
C . 9
D . 12

View Answer

Answer: B

Explanation:

Pairwise testing is a technique that tests all possible discrete combinations of each pair of input parameters. In this case, there are two main categories: Colour and Shape. Under Colour, there are three subcategories: Red, Blue, and Green. Under Shape, there are two subcategories: Triangle and Circle. There is an additional category under Triangle labeled Size of triangle, with two subcategories:

Small and Large. To test all pairs of these parameters, we need to use a tool or an algorithm that can generate the optimal test cases.

One such tool is Pairwise.org, which can produce the following test cases:

Table

These eight test cases cover all pairs of parameters, such as Red-Triangle, Red-Small, Blue-Circle, etc. Therefore, the answer is B. 8.

Reference = Pairwise Testing or All-Pairs Testing Tutorial with Tools and Examples, Pairwise Testing – What It Is, When & How to Perform?, All-pairs testing – Wikiwand, ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst (Section 3.2.3)