CAST CAST - Test Metrics and Measurement Questions and Answers

Question 1

What is a software test metric?

Accepted Answer

A quantitative measure used to evaluate some aspect of software testing

Answer

Test metrics are quantitative measures that help teams understand, control, and improve the testing process and product quality.

Question 2

Which of the following is an example of a process metric in software testing?

Accepted Answer

Test case execution rate

Answer

Test case execution rate measures the efficiency of the testing process itself, making it a process metric.

Question 3

What does 'test coverage' measure?

Accepted Answer

The proportion of the system that has been exercised by tests

Answer

Test coverage indicates what percentage of code, requirements, or other criteria have been exercised by the test suite.

Question 4

What is 'defect density'?

Accepted Answer

The number of confirmed defects per unit size of the software

Answer

Defect density is calculated as the number of defects per thousand lines of code (KLOC) or per function point.

Question 5

Which formula correctly calculates Defect Removal Efficiency (DRE)?

Accepted Answer

DRE = Defects found before release / (Defects found before + after release) × 100%

Answer

DRE measures the percentage of total defects that were caught before product delivery to the customer.

CAST Test Practice Test