ISTQB Certified Tester Advanced Level – Test Analyst (CTAL-TA) — Question 1

A tablet manufacturer offers the following options for its customers:
Colour – Black, White, Silver, Gold

Model – Standard, Mini, Pro -

Gigabytes – 32, 64, 128, 256 -
Connectivity – Wifi only, Wifi+Cellular
When applying the pairwise test technique, how many TEST CASES would be needed to ensure that ALL pair combinations are tested?

Answer options

Correct answer: D

Explanation

The pairwise testing technique focuses on testing all possible pairs of options to minimize the number of test cases while maximizing coverage. In this scenario, the calculations lead to 16 distinct test cases needed to ensure all pair combinations are tested, making option D the correct answer, while the other options do not account for the full range of combinations.