Exam CTFL v4.0 topic 1 question 27 discussion

Actual exam question from ISTQB's CTFL v4.0

Question #: 27
Topic #: 1

You are using boundary value analysis to determine your test data.
What values should you use to test a routine that requires an integer input (x) to be greater than zero and less than 100 to achieve 100% minimum coverage using the two-point boundary value analysis technique?

A. 0, 100
B. -1, 1, 99, 101
C. 0, 1, 99, 100
D. -1, 0, 1, 99, 100, 101

Show Suggested Answer

Suggested Answer: B 🗳️

by Krth at Jan. 7, 2024, 7:26 a.m.

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user2524241

Highly Voted 8 months, 2 weeks ago

Can somebody explain this answer? Given that "In 2-value BVA (Craig 2002, Myers 2011), for each boundary value there are two coverage items: this boundary value and its closest neighbor belonging to the adjacent partition. To achieve 100% coverage with 2-value BVA, test cases must exercise all coverage items, i.e., all identified boundary values. Coverage is measured as the number of boundary values that were exercised, divided by the total number of identified boundary values, and is expressed as a percentage." it seems like it should be 0, 1, 99, 100 by the options given..

upvoted 12 times

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elen4eabv

Most Recent 4 months, 4 weeks ago

I thin the answer is C Invalid range- 0 -> test values: 0 Valid range 1 - 99 -> Test values 0,1, 99, 100 Invalid range 100 to inf -> test values: 99, 100 to sum up: 0,1,99,100 C has all there values, nothing more nothing less

upvoted 2 times

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