Your question is Ultrasonic Sensor Operation. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Explain how an ultrasonic sensor works and how you would compute distance from its signals.
Cover the transmitter, receiver, time-of-flight measurement, and the distance equation. Explain how you would handle temperature, timer resolution, missed echoes, multipath reflections, and implausible readings in embedded firmware. Be prepared to identify basic tampering or spoofing risks and describe how you would verify the implementation.