Discuss ISTQB ISTQB-CTFL Exam Topic 5 Question 19

Which or the following is a valid collection of equivalence classes for the following problem: An integer field shall contain values from and including 1 to and including 15.

ALess than 0.1 through 14. 15 and more

BLess than 1.1 through 14. more than 15

Cnegative numbers. 1 through 15. above 15

DLess than 1.1 through 15. more than 15

Suggested Answer: D

Equivalence partitioning is a black-box test design technique where inputs to the software or system are divided into groups that are expected to exhibit similar behavior. For an integer field that should accept values from 1 to 15, the valid equivalence class is 1 through 15. The invalid equivalence classes are numbers less than 1 and numbers more than 15. Therefore, option D, 'Less than 1, 1 through 15, more than 15,' correctly identifies the valid equivalence class along with the two invalid classes, covering all possible input scenarios for the field. Options A, B, and C either do not accurately capture the valid range or incorrectly specify the range boundaries.

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21 comments · newest first

Lenny 10 months ago

I'm surprised this is even a question, it's pretty straightforward!

Wynell 11 months ago

Wait, are negative numbers really included?

Carla 11 months ago

Definitely not A, that's way off.

Paul 11 months ago

I think D is valid too, right?

Alesia 11 months ago

Option C is the only one that makes sense.

Alline 12 months ago

I thought equivalence classes should cover all ranges, but I'm confused about the upper limits in these options.

Florinda 12 months ago

I practiced a similar question, and I feel like "less than 1.1" might be too broad. Maybe option D is the right choice?

Sol 12 months ago

I think option C sounds familiar since it includes negative numbers, but I can't recall if that's valid for this problem.

Chau 1 year ago

I remember we discussed equivalence classes in class, but I'm not sure if "less than 1.1" is correct for this range.

Candida 1 year ago

I've got a good feeling about option D. It seems to capture the range of values from 1 to 15 in a clear and logical way. I'll go with that unless I spot something I'm missing.

Adolph 1 year ago

Okay, let me think this through step-by-step. The question is asking for a valid collection of equivalence classes for the integer field from 1 to 15. I need to consider how to group the values in a meaningful way.

Laurene 1 year ago

Hmm, I'm a bit unsure about this one. The wording is a bit tricky, and I want to make sure I understand the requirements correctly before selecting an answer.

Rozella 1 year ago

This looks like a straightforward question about defining equivalence classes. I'll carefully read through the options and think about which one best captures the given range of integers from 1 to 15.

Sean 1 year ago

I think I have a good handle on this. I'll start by exploring the Monitoring tab and Dashboard in the Administration console, as those seem like the most straightforward solutions for this type of monitoring task.

Jenelle 1 year ago

Hmm, I'm a bit unsure about this one. The functions of the IFRS Advisory Council aren't something I've focused on too much in my studies. I'll have to think this through carefully.

Lonny 2 years ago

That’s a good point. C seems logically complete.

Juliann 2 years ago

I agree. Options A, B, and D have odd ranges, like 'Less than 1.1'.

Willow 2 years ago

Well, it clearly covers negative numbers, the range 1 to 15, and numbers above 15.

Ona 2 years ago

Why do you think C is correct?

Willow 2 years ago

Yeah, quite tricky. I think answer C makes the most sense.

Lonny 2 years ago

Interesting question in the exam, don't you think?

ISTQB-CTFL Exam - Topic 5 Question 19 Discussion