ISO 26262:2018 Road vehicles -- Functional safety Foundation Free Practice Test — 30 Questions

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Question 1 of 30

AutoDrive Systems, a Tier 1 automotive supplier, is developing an advanced driver-assistance system (ADAS) feature that relies on sensor fusion of data from multiple radar and camera inputs. This fused data is used for critical decision-making, such as initiating emergency braking. During testing, engineers observe that the ADAS occasionally triggers emergency braking unnecessarily in situations where no immediate threat exists. Further investigation reveals discrepancies in the object detection data after sensor fusion. Specifically, the distance to a detected object reported by the fused data sometimes differs significantly from the distances reported by the individual radar and camera sensors before fusion, even after accounting for known sensor biases and calibration errors.

Which dimension of data quality is MOST directly compromised in this scenario, and what specific risk does this pose to the functional safety of the ADAS?

Consistency; the risk is that conflicting data from different sensors after fusion leads to incorrect environmental interpretation and potentially unsafe actions by the ADAS.
Timeliness; the risk is that delays in data processing and fusion result in the ADAS reacting too slowly to potential hazards.
Accuracy; the risk is that inherent sensor errors and calibration inaccuracies propagate through the fusion process, leading to an imprecise representation of the environment.
Completeness; the risk is that missing sensor data during fusion leads to an incomplete understanding of the environment, causing the ADAS to make decisions based on partial information.

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