ISTQB ATA Exam - Topic 4 Question 103 Discussion

Actual exam question for ISTQB's ATA exam

Question #: 103
Topic #: 4

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.

Applying equivalence partitioning to the ''Tax System'' specification, which of the following set of equivalence classes is most effective in testing the processing the number of children?

[K3] 2 credits

A2, 4 and 6 children

B2, 4 and 5 children

C1, 3 and 6 children

D3, 4 and 6 children

Show Suggested Answer

Suggested Answer: B

by Rolland at Apr 11, 2026, 03:43 PM

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Hyman

18 days ago

I think A is better, 6 kids shouldn't be included.

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Stefania

23 days ago

Option B seems right, covers the range for the reduction.

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Tom

1 month ago

I think option A is wrong because it includes 6, which is definitely outside the range. I remember that we should only consider valid inputs.

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Aja

1 month ago

I feel like option B makes the most sense since it includes 2, 4, and 5, but I'm not entirely sure if 5 is valid since it says less than five.

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Claribel

2 months ago

I'm a bit unsure about the options. I remember practicing with equivalence classes, but I can't recall if we should include numbers outside the specified range.

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Loren

2 months ago

I think we need to focus on the range of children specified in the question. It mentioned more than two and less than five, so that might help narrow it down.

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