ISTQB Certified Tester Advanced Level – Test Analyst (CTAL-TA) — Question 29

How many cases are required to test the tax system specification as described below, using a decision table which is not collapsed?

Tax system -
A tax system needs to be updated due to new legislation. For a person with a salary of less than € 20.000 and who is married, the tax needs to be re-calculated. If the person also has more than two and less than five children, an additional 10% reduction is applicable.

Answer options

• A. 2
• B. 4
• C. 6
• D. 8

Correct answer: D

Explanation

The correct answer is 8 because the decision table requires considering multiple combinations of salary, marital status, and number of children. Each condition can create different pathways that must be tested to ensure the tax system operates correctly under the new legislation.