Which of the following options represent correct set of data for valid equivalence class partitions?

4 equivalence classes are given for integer values:

0 < x <100

100<= x <= 200

200 < x < 500

x >= 500

Which of the following options represent correct set of data for valid equivalence class partitions?
A . 50; 100; 200. 1000
B . 0. 1.99, 100.200,201.499, 500;
C . 0.50; 100; 150.200.350.500;
D . 50; 100; 250; 1000

View Answer

Answer: C

Explanation:

The correct set of data for valid equivalence class partitions should include one value from each equivalence class, and no value from outside the range. Option C satisfies this condition, as it has one value from each of the four equivalence classes (50, 100, 250, 500). Option A has two values from the same equivalence class (100 and 200), option B has values outside the range (0 and 0.99), and option D has two values from the same equivalence class (1000 and 500).

Verified Reference: A Study Guide to the ISTQB® Foundation Level 2018 Syllabus – Springer, page 35.