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Order numbers on a stock control system can range between 10000 and 99999 inclusive. Which of the following inputs might be a result of designing tests for only valid equivalence classes and valid boundaries:
a) 1000, 5000, 99999
b) 9999, 50000, 100000
c) 10000, 50000, 9999
d) 10000, 99999
e) 9999, 10000, 50000, 99999, 10000

Interview question?
Exam?

What would be your best guess as to the correct answer, and why?

Valid eqiuv class input is 50000

Valid lower boundary i/p is 10001
Valid Upper " " is 99998
Valid on the " " is 10000 and 99999

I think , no option has this set of values...exept option d.
But the exam is saying option c.

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...exept option d.
But the exam is saying option c.

[/ QUOTE ]

What exam?
It's saying "c) 10000, 50000, 9999" ?

If I understand the words in the question, I prefer your answer.

It is ISTQB foundation level practice exam.....

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[/ QUOTE ]

Can you explain why you prefer "E"?

According to this

the answer is "C", except their "C" is:

c) 10000, 50000, 99999

(I agree with "10000, 50000, 99999" as the likely answer. vkath - perhaps you mistyped the choices?)

I think the answer is "E", because it's the only option that cover all scenarios:

9999 - value &lt; lower limit
10000 - value = lower limit
50000 - value inside the lower and upper limit
99999 - value = upper limit
100000 - value &gt; upper limit

*check if you don't have missed one zero in the answer "E"

Leonardo I'd agree with you except for this statement:

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...designing tests for only valid equivalence classes and valid boundaries...

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Since 99999 and 100000 are outside the "valid" range the author might not be considering them as part of the answer to the question.

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Leonardo I'd agree with you except for this statement:

[ QUOTE ]
...designing tests for only valid equivalence classes and valid boundaries...

[/ QUOTE ]
Since 99999 and 100000 are outside the "valid" range the author might not be considering them as part of the answer to the question.

[/ QUOTE ]

I think you're right.

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