Manual Testing / Quiz
Pairwise: Taming the Combination Explosion
Four dropdowns, three values each: 81 combinations, or about a dozen if you know why pairs matter more than everything-at-once. The math that makes coverage affordable.
- Difficulty
- Medium
- Format
- Quiz
- Points
- 150
- Estimate
- 9 min
// MISSION BRIEF
Your Mission
The export feature has format (PDF/CSV/XLSX), language (EN/HI/DE), platform (web/iOS/Android), and account tier (free/pro/enterprise). Full combinatorial coverage is 81 runs. Your sprint budget is one afternoon.
Six questions on pairwise (all-pairs) testing: the empirical basis, the mechanics, and the traps. Speed bonus active.
// FIRST CONTACT
Battle teaser
The empirical justification for pairwise testing:
- ATwo-parameter tests are twice as fast to run
- BIt is required by ISTQB syllabi
- CField-failure studies (notably NIST's) found most defects are triggered by a single parameter or an interaction of two, higher-order interactions cause a small minority
- DTesters can only keep two variables in mind at once
Answers, scoring, hints, and the full battle stay sealed.
// SKILL TAGS
test-designpairwisecombinatorialmanual-testing