Istqb Certified Tester Foundation Level CTFL · Free Practice Question Medium
Question 11
For the following State Transition Diagram, These test cases were executed:
i. S1 > S2 > S3 > S4
ii. S1 > S4 > S5 > S6
iii. S1 > S4 > S5 > S3 > S4
iv. S1 > S4 > S2 > S3 > S4
Which of the following statements is TRUE?
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A
i and iii achieve 100% all states coverage while ii and iv achieve 66.6% valid transitions coverage.
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B
i and iv achieve 100% valid transitions coverage while ii and iii achieve 100% all transitions coverage.
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C
i and ii achieve 100% all states coverage while iii and iv achieve 75% valid transitions coverage.
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D
i and ii achieve 100% all transitions coverage while iii and iv achieve 33.3% all states coverage.
Reveal correct answer
Correct answer: C
Explanation
The system includes 7 states, all of them are covered in the first two test cases. It also includes 8 transitions, if you trace test cases iii and iv, you will find that they cover different 6 transitions, so valid transitions coverage is 6/8 which is 75%
Discussion
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