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ISTQB CTAL-TTA Exam - Topic 2 Question 49 Discussion

Posted by Cyndy on May 07, 2026 at 01:13 AM

You are testing software that will be used in nuclear power plants. The particular piece of code you are testing has been classified as SIL 2. The following section of code falls under this classification:

If ((A > B) or (C > D)) and (E = F) then print A

Endif

Which of the following sets of test data would supply the minimum tests needed to achieve the "highly recommended" level of coverage?

Suggested Answer: A

In software testing, especially within contexts like nuclear power plants, achieving a 'highly recommended' level of coverage often requires strategic test case selection to verify all logical conditions are accurately assessed. For the condition 'If ((A > B) or (C > D)) and (E = F) then print A', the critical tests involve evaluating the boolean logic.

Test Case Analysis: Test Set 1 is selected because it should ideally include scenarios where:

Both conditions (A > B) and (C > D) are true, and (E = F) is true to ensure the print statement executes.

One of the conditions (A > B) or (C > D) is false while the other is true, combined with (E = F) being true, to test the OR logic.

Both conditions (A > B) and (C > D) are false with (E = F) being true, which should not trigger the print statement, testing the AND logic.

Condition where (E != F), irrespective of other conditions, to confirm that the print statement does not execute.


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24 comments · newest first
RO
Rosalia 2 days ago
Set 2 ensures all conditions are tested.
LO
Louvenia 7 days ago
I lean towards Set 1 for simplicity.
TH
Therese 12 days ago
Set 5 looks promising too.
AN
Angelyn 17 days ago
Set 3 might cover more scenarios.
RE
Ressie 23 days ago
I think Set 2 is the best choice.
VA
Valda 28 days ago
I feel unsure about the coverage levels.
GA
Gabriele 1 month ago
This question is tricky!
TH
Theron 1 month ago
Definitely Set 2 for SIL 2. Safety is key!
LU
Lura 1 month ago
Set 1 doesn’t provide enough coverage. Avoid it!
BE
Beckie 2 months ago
I feel confident about Set 2. It’s the safest option.
MO
Moira 2 months ago
Set 5 might miss some edge cases. Not a good pick.
JI
Jina 2 months ago
I agree with Set 2. It tests all branches effectively.
TH
Theron 2 months ago
Set 3 seems good too, but not as comprehensive.
JA
Jacki 2 months ago
I think Set 2 is the best choice. It covers all conditions.
MA
Maryrose 2 months ago
This question is tricky. I feel unsure about the coverage levels.
TA
Talia 3 months ago
Totally agree, Set 3 is the way to go!
BU
Bulah 3 months ago
Set 1 seems too basic for SIL 2 requirements.
AN
Anisha 3 months ago
Wait, how can we be sure Set 5 even tests everything?
DE
Dexter 3 months ago
Nah, Set 2 is definitely the best choice here.
LA
Lashonda 3 months ago
I think Set 3 covers all the conditions.
AL
Allene 4 months ago
I’m a bit confused about the minimum tests needed. I thought we needed to ensure both parts of the OR condition are tested, so maybe Set 1?
AR
Armanda 5 months ago
I practiced a similar question where we had to analyze conditions. I think Set 5 might be the one that meets the "highly recommended" level.
ST
Stanford 5 months ago
I'm not entirely sure, but I feel like Set 3 could also provide good coverage since it tests multiple conditions.
TE
Teri 5 months ago
I remember we discussed the importance of covering all logical paths in conditional statements. I think Set 2 might be the right choice for that.
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