CTFL-AT: Certified Tester Foundation Level Agile Tester

By ISTQB · Question Mode

QuestionQ40

Agile Testing Methods, Techniques and Tools

User Story: As a user, I want to calculate the tax percentage based on an income amount.

Which black-box test design technique is best for verifying the accuracy of this user story?

Explanation

Equivalence partitioning is a black-box technique that selects representative income values from distinct input classes, such as different income ranges, to verify that tax-percentage calculations produce correct results across the domain. Statement testing requires knowledge of internal code and is therefore a white-box technique.

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