ISTQB CT-AI – Certified Tester AI Testing — Question 2

While measuring the test coverage of a neural network, a test engineer wants to measure the number of neurons that have each output two activation function results with a minimum difference between the two results of 0.5.
Which ONE of the below coverage measures would achieve that goal?

Answer options

• A. Neuron coverage
• B. Value-change coverage
• C. Sign-change coverage
• D. None of the coverage measures

Correct answer: B

Explanation

Value-change coverage is the correct answer because it specifically looks at the changes in output values of neurons, focusing on the differences between activation results. Neuron coverage measures whether neurons were activated but does not account for the magnitude of change, while sign-change coverage only looks at whether the output changed signs, making them unsuitable for this specific requirement.