ISTQB Advanced Test Analyst (ATA) — Question 5

A temperature unit holds the temperature between 10 degrees Celcius and 10 degrees Celcius. If the temperature drops below 10 or rises above 10 then an alarm rings. Boundary Value Analysis tests are drawn up using the approach of two test cases per boundary. The temperatures to be tested are:

Answer options

• A. 11, 10, -11, -10
• B. 11, 10, 9, -11, -10, -9
• C. 11, 9, -9, -11
• D. 10, 9, -9, -10

Correct answer: A

Explanation

The correct answer is A because it includes the boundary value of 10 degrees Celsius and tests values just above and below it, which is essential for Boundary Value Analysis. The other options either include unnecessary values or do not properly test the boundary conditions as effectively as option A.