Question 430
During follow-up testing at a museum exhibit, engineers review a previously reported fault: A site manager interprets two BLE tags detected by the same AP as proof that their wearers were within arm's reach for ten minutes. Which observation confirms resolution rather than an unrelated improvement?
Explanation
Correct Answer
Controlled calibration tests report realistic proximity error bounds rather than exact physical contact. This directly checks the outcome of the chosen remediation and confirms the problem was not merely hidden. The diagnostic issue was: shared AP reception is too coarse to establish precise person-to-person contact.
Incorrect Answers
Expired trace events are removed under policy while specifically protected records remain available. This would demonstrate a different scenario was fixed—an incident review requests six months of all worker proximity histories despite the approved emergency trace period being much shorter—but does not validate recovery from a site manager interprets two BLE tags detected by the same AP as proof that their wearers were within arm's reach for ten minutes.
An eligible opt-in device with granted permissions receives the intended zone-triggered notification. This would demonstrate a different scenario was fixed—a lobby campaign is configured correctly but an old test mobile app receives no proximity notification because its notification permissions are disabled—but does not validate recovery from a site manager interprets two BLE tags detected by the same AP as proof that their wearers were within arm's reach for ten minutes.
The approved trace workflow retains only necessary records under documented authorization. This would demonstrate a different scenario was fixed—a company enables proximity tracing for employees without first establishing a legitimate purpose and approved data-handling policy—but does not validate recovery from a site manager interprets two BLE tags detected by the same AP as proof that their wearers were within arm's reach for ten minutes.