ISTQB Certified Tester Foundation Level (CTFL 2018) — Question 23

A holiday club restricts those booking the holiday, to people between the ages of 18 and 30 inclusive.
Using three-point boundary values, what ages would be required to test the lower and upper boundary?

Answer options

• A. 17, 18, 19, 29, 30, 31.
• B. 17, 18, 19, 30, 31, 32.
• C. 18, 19, 20, 28, 29, 30.
• D. 16, 17, 18, 30, 31, 32.

Correct answer: A

Explanation

The correct answer A includes the values just below and above the boundaries (17 and 31) along with the boundaries themselves (18 and 30), which are essential for three-point boundary value testing. Options B, C, and D do not correctly represent both boundaries or include necessary values just outside the limits for effective testing.