CSCP Exam - Question 672

The classification tree method involves determining the number of possible combinations of the categories to ensure all scenarios are covered. In this classification tree, there are three categories for Colour (Red, Blue, Green), two basic shapes (Triangle, Circle), and two sizes for Triangle (Small, Large). To find out how many test cases are required, we need to calculate the number of combinations. For Colour (3) and Shape (2), along with the two sizes of the triangle (2), the combinations are as follows: For each of the 3 colours, there are 1 circle and 2 triangles of different sizes (small and large). Therefore, the calculation would be 3 (colours) * 2 (shapes: triangle with sizes) + 3 (colours) * 1 (shape: circle) = 3 * 2 + 3 * 1 = 6 + 3 = 9. However, since shapes that don't bifurcate into a size count once, the breakdown is 3 (colours) * 2 (triangles with sizes) + 3 (colours) * 1 (circle) which simplifies directly to 6. Hence, a total of 6 test cases are required.