ISTQB ATA Exam - Topic 6 Question 97 Discussion

Actual exam question for ISTQB's ATA exam

Question #: 97
Topic #: 6

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.

How many input classes can be distinguished when applying equivalence partitioning to the ''Tax System'' specification?

[K3] 2 credits

Show Suggested Answer

Suggested Answer: B

by Jaime at Nov 25, 2025, 11:30 PM

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Mabel

1 month ago

So, 6 seems reasonable. It covers all cases.

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Sang

2 months ago

Right! More than two kids means a reduction.

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Cassie

2 months ago

What about the children factor? That changes things.

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Mabel

2 months ago

I agree. There are different scenarios to consider.

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Sang

2 months ago

Yeah, I feel like it’s more than 5. Maybe 6?

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Mabel

2 months ago

This question is tricky. I think it’s about identifying classes.

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Jesusa

2 months ago

Totally agree, 5 makes the most sense.

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Luke

3 months ago

I’m surprised there’s a reduction for kids!

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Norah

3 months ago

Wait, how do we get to 7? That seems off.

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Ernie

3 months ago

There are definitely 5 input classes here.

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Jess

4 months ago

This is a classic case of overthinking it. The answer is clearly A) 5 - salary, marital status, and number of children, each with two possible values.

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Shonda

4 months ago

C) 7 seems like the most logical answer to me. The specification covers all the key factors, and you can easily divide them into distinct equivalence classes.

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Amie

4 months ago

Haha, this question is a real head-scratcher. I'm going to go with B) 6 just to be different. Who knows, maybe I'll get lucky!

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Alline

4 months ago

Hmm, I'm not so sure. The question says "how many input classes can be distinguished," which makes me think the answer might be D) 8. There could be separate classes for single/married, with/without children, and different salary ranges.

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Charlene

4 months ago

I’m a bit confused about how to count the children’s impact. Does it mean we should separate the cases for 0, 1, 2, 3, 4, and 5 children?

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Fletcher

4 months ago

I feel like there could be 7 classes if we consider all the combinations of salary, marital status, and number of children.

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Marshall

5 months ago

I think we might have practiced a similar question about tax brackets, and I want to say there are at least 6 input classes here.

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Francoise

5 months ago

This is a straightforward application of equivalence partitioning. I've got this - just need to make sure I don't miss any of the edge cases.

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Maddie

5 months ago

Alright, I've got a strategy. I'll start by identifying the different ranges for each condition, then see how they can be combined to create the input classes. I think I can nail this one.

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Raymon

5 months ago

I think the answer is C) 7. The specification mentions three conditions: salary, marital status, and number of children. Each of these can be partitioned into two or more equivalence classes.

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Nidia

5 months ago

I remember we discussed equivalence partitioning in class, but I'm not entirely sure how many classes this tax scenario would have.

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Gerardo

5 months ago

I'm a bit confused by the wording here. What exactly do they mean by "input classes" in the context of equivalence partitioning? I'll need to review that concept.

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Barb

6 months ago

I think it’s actually 6.

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Tenesha

6 months ago

Okay, let's break this down. We have three main conditions: salary, marital status, and number of children. I think I can work with that.

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Bettina

6 months ago

Hmm, this looks like a tricky one. I'll need to carefully consider all the different factors involved - salary, marital status, and number of children.

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