CAST CAST - Test Metrics and Measurement Questions and Answers 2

Question 1

What does a 'defect aging' metric measure?

Accepted Answer

How long defects have remained open without being resolved

Answer

Defect aging tracks how long each defect has been in an open state, helping identify bottlenecks in the fix-and-verify cycle.

Question 2

Which type of metric directly reflects end-user perception of software quality?

Accepted Answer

Product metrics such as customer-reported defects

Answer

Customer-reported defects and user satisfaction scores are product metrics that reflect real-world quality as experienced by users.

Question 3

What is a 'test pass rate' metric?

Accepted Answer

The ratio of test cases that passed to total test cases executed

Answer

Test pass rate = (Number of tests passed / Total tests executed) × 100%, indicating overall product health.

Question 4

In software testing, what does 'requirements coverage' measure?

Accepted Answer

The proportion of requirements that are traced to at least one test case

Answer

Requirements coverage ensures that every specified requirement has at least one corresponding test case.

Question 5

What is 'mean time to detect' (MTTD) in the context of defect metrics?

Accepted Answer

The average time from when a defect is introduced to when it is discovered

Answer

MTTD measures how quickly the testing process identifies defects after they are introduced into the codebase.

CAST Test Practice Test