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Question 148 - CTFL4 discussion

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A class grade application for instructors assigns letter grades based on students' numerical grades.

The letter grades for different numerical grades should be:

Above 89, up to 100 - A

Above 79, up to 89 * B

Above 69, up to 79 * C

Above 59, up to 69 - D

Below 60 - F

Which of the following sets of test inputs would achieve the relatively highest equivalence partition coverage?

A.
0, 58.59,70, 80
Answers
A.
0, 58.59,70, 80
B.
74, 79.84,85, 89
Answers
B.
74, 79.84,85, 89
C.
79, 89.90,99, 100
Answers
C.
79, 89.90,99, 100
D.
69, 79. 80, 89, 90
Answers
D.
69, 79. 80, 89, 90
Suggested answer: D

Explanation:

The set of test inputs that achieve the relatively highest equivalence partition coverage for grading students is option D: 69, 79, 80, 89, 90. This set effectively tests the boundaries between each grade category, ensuring that the grading system accurately transitions from one grade to another at the correct thresholds (ISTQB Main Web).

Reference:

ISTQB Certified Tester Foundation Level Syllabus v4.0: ISTQB CTFL Syllabus v4.0 PDF

asked 18/09/2024
Toan Tran
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