ISTQB Exam ISTQB-Agile-Public Topic 1 Question 8 Discussion

Actual exam question for ISTQB's ISTQB-Agile-Public exam

Question #: 8
Topic #: 1

[All ISTQB-Agile-Public Questions]

User Story: As a user I want to be able to calculate tax percentage based on amount of income.

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

SELECT ONE OPTION

AUser story testing - test that the user can enter an income amount and get a result

BEquivalence partitioning - test with low, medium and high income.

CStatement testing - test all statements in income calculation.

DState transition testing - test all states of income entry.

Show Suggested Answer

Suggested Answer: B

Equivalence partitioning is a black box test design technique suitable for verifying the accuracy of user stories like the one described. It involves dividing input data of a software unit into partitions of equivalent data from which test cases can be derived. For a user story involving tax percentage calculation based on income, Equivalence Partitioning allows the creation of test cases for different income ranges (low, medium, high) to ensure that the system accurately calculates tax percentages for each partition, thus covering various scenarios within the application's functionality.

by Albina at Apr 11, 2024, 09:30 PM

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Terrilyn

5 months ago

By testing all statements in the income calculation, we can ensure complete coverage of the functionality.

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Gussie

6 months ago

Why do you think so, Terrilyn?

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Terrilyn

6 months ago

I disagree, I think Statement Testing would be more thorough.

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Crista

6 months ago

Because testing with low, medium, and high income amounts covers a wide range of possible scenarios.

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Gussie

6 months ago

Why do you think so, Crista?

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Crista

6 months ago

I think Equivalence Partitioning would be the best technique.

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Denae

7 months ago

That's a good point, we should consider that as well.

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Margot

7 months ago

But wouldn't User story testing also be important to make sure the user can actually get the result they expect?

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Jeff

7 months ago

I agree with we need to test with different income levels to ensure accuracy.

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Denae

7 months ago

I think Equivalence partitioning would be the best choice for testing this user story.

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Deane

7 months ago

That makes sense. It covers a wide range of scenarios.

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Rima

7 months ago

B) Equivalence partitioning - test with low, medium and high income.

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Lashon

8 months ago

Woah, state transition testing? That sounds a bit overkill for a simple tax calculation feature. I'd stick with the more straightforward approaches like equivalence partitioning or user story testing.

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Johna

8 months ago

Hmm, statement testing could work, but I'm not sure it's the *best* approach here. I think state transition testing might be more comprehensive, testing all the possible states of the income entry process.

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Patria

8 months ago

I don't know, you guys. I'm leaning more towards statement testing. We should make sure all the individual statements in the income calculation are working correctly. That feels like a solid approach to me.

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Princess

8 months ago

I kind of agree with Hayley. User story testing seems more aligned with the actual requirement. Plus, it's more user-centric, which is important for a feature like this.

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Hayley

8 months ago

I'm not so sure about that. I think user story testing might be a better fit here. We need to verify that the user can actually perform the key task of entering an income amount and getting the result.

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Asha

8 months ago

Hmm, this question is interesting. I think the best approach here would be equivalence partitioning. Testing with low, medium, and high income levels should cover the key scenarios and ensure the accuracy of the tax calculation.

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