CTFL_Syll2018 Exam Dumps | What is a defect density?

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Question 114/155

What is a defect density?

A. The percentage of defects identified over the total number of test cases

B. The deviation rate of the system from its expected behavior

C. The ratio of the defects identified in these system over the expected number of total defects

D. The number of defects identified in the system under test divided by the size of the system

Correct Answer: D

Defect density is a metric that measures the number of defects identified in the system under test divided by the size of the system. The size of the system can be measured in different ways, such as lines of code, function points, or modules. Defect density can be used to compare the quality of different systems or different versions of the same system.
References: [Certified Tester Foundation Level Syllabus], Section 8.3.1

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