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ISTQB ATTA Exam - Topic 5 Question 128 Discussion

Part 1 "Test Techniques various"If we say that a set of tests has achieved 100% structural decision coverage on a particular module in a program, what does that mean? 1 credit [K2]
B) That every control flow branch had been executed at least once by those tests.
A) That all bugs present in that module were necessarily revealed by those tests.
C) That every dataflow in that module was exercised at least once by those tests.
D) That every path through that module was exercised at least once by those tests.

ISTQB ATTA Exam - Topic 5 Question 128 Discussion

Actual exam question for ISTQB's ATTA exam
Question #: 128
Topic #: 5
[All ATTA Questions]

Part 1 "Test Techniques various"

If we say that a set of tests has achieved 100% structural decision coverage on a particular module in a program, what does that mean? 1 credit [K2]

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Suggested Answer: B

by Yolande at Jun 27, 2026, 04:42 PM

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Yuonne
5 hours ago
I’m confused about the difference between decision coverage and dataflow coverage. I feel like I might mix up B and C.
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Leila
5 days ago
I practiced a similar question where we discussed paths and branches, and I think decision coverage is about branches, so B makes sense to me.
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Lenna
11 days ago
I’m not entirely sure, but I remember something about decision coverage not guaranteeing all bugs are found, so A seems wrong.
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Teri
16 days ago
I think structural decision coverage means that every control flow branch was executed, so I’m leaning towards option B.
upvoted 0 times
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