CT-AI · Question #159
A car insurance company is using a new AI service to reward defensive driving behavior among its policyholders. The driving behavior is recorded in a rating number (score). The AI service determines…
The correct answer is C. Test B is not a follow-up test case. According to the ISTQB CT-AI syllabus,metamorphic testingworks by applyingmetamorphic relations (MRs): predictable input transformations that should lead to predictable output changes. From the initial test data, clear relations emerge for defensive driving scoring. The score…
Question
A car insurance company is using a new AI service to reward defensive driving behavior among its policyholders. The driving behavior is recorded in a rating number (score). The AI service determines this score from the following input values:
Reference speed v_max in km/h Average speed v_mean in km/h Average acceleration a_pos in m/s2 Average braking deceleration a_neg in m/s2 The more defensive the driving behavior is (slow driving, low acceleration, low braking deceleration), the higher is the score. Three initial test cases (Test 1 to Test 3) are used for testing the AI service. In addition, new test cases A-D are proposed. Which of the new tests is NOT a follow-up test case for metamorphic testing?
Exhibit
Options
- ATest A is not a follow-up test case.
- BTest C is not a follow-up test case.
- CTest B is not a follow-up test case.
- DTest D is not a follow-up test case.
How the community answered
(37 responses)- A16% (6)
- B8% (3)
- C73% (27)
- D3% (1)
Explanation
According to the ISTQB CT-AI syllabus,metamorphic testingworks by applyingmetamorphic relations (MRs): predictable input transformations that should lead to predictable output changes. From the initial test data, clear relations emerge for defensive driving scoring. The score v_mean decreases, a_pos decreases, a_neg becomes less negative,and decreases when the opposite occurs. A valid metamorphic follow-up test must modify inputs in a direction consistent with at least one MR while keeping the expected output direction predictable. Test Alowers v_mean compared to Test 1, with similar acceleration values. This directly satisfies the MR that lower speed -> higher score. Test Cincreases both acceleration and braking intensity compared to Test 2, making the reduced score range (30-70) consistent with more aggressive driving. Test Dmodifies acceleration and braking magnitudes in ways consistent with Test 3's defensive- driving scoring boundaries. Test B, however, changes multiple variables in contradictory directions: v_mean increases (worse) a_pos increases (worse) a_neg becomes less negative (better) Because these changes conflict,the expected score trend becomes unpredictable, violating the premise of a metamorphic follow-up test. Thus Test B cannot be considered a metamorphic follow-up, which makes Option C correct. Exam Questions, Study Guides, Practice Tests. Lead the way to help you pass any IT Certification exams, 100% Pass Guaranteed or Full Refund. Especially Cisco, Microsoft, CompTIA, Citrix, EMC, HP, Oracle, VMware, Juniper, Check Point, LPI, Nortel, EXIN and so on. Our Slogan: First Test, First Pass. Help you to pass any IT Certification exams at the first try. You can reach us at any of the email addresses listed below. Any problems about IT certification or our products, you could rely upon us, we will give you satisfactory answers in 24 hours.
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