Test Automation — question 8 of 10
Write a real answer. It is graded against the question's rubric, and the mastery movement is computed by the same engine the product uses. Scoring here is deterministic rather than model-written, so this page costs nothing to run and nothing is saved. In a track built from your own posting, the same rubric is graded by the model, which is what produces feedback about your reasoning rather than about coverage.
You've automated a test for a sensor interface board. It sweeps three fixed input voltages spanning the sensor's specified range and checks the output reading is within tolerance at each point. Every board run through this test for the last month has passed. A batch of those boards later shows occasional bad readings in the field. What kinds of real defects could sail through 100% of this fixed-point test, and how would you change the test to catch them?