IPA IP 2026 Question 78
A question IPA Japan published in 令和8年度 ITパスポート試験 公開問題 問78, translated into English. ITPEC is based on the same exams.
There is a system that consists of IoT devices and an IoT server, in which an IoT device sends the outside air temperature that it measured to the IoT server, and the IoT device opens and closes a window by following instructions from the IoT server. Which of the following is installed in the IoT device of this system and has the role of converting the outside air temperature into an electrical signal?
Explanation
Sensor — the component that measures a physical quantity such as temperature and converts it into an electrical signal.
The system works as a loop. The sensor in the IoT device turns the outside air temperature into an electrical signal, and the device sends the measured value to the IoT server. The server decides whether the window should be opened or closed and sends an instruction back. The actuator in the IoT device turns that electrical instruction into physical movement and opens or closes the window.
Answer (d)
Why not others:
- •(a) — an actuator works the other way round, converting an electrical signal into motion; here it is what opens and closes the window
- •(b) — edge computing processes data close to the devices instead of on a distant server, to cut delay and traffic; it is a way of placing processing, not a measuring component
- •(c) — carrier aggregation is a mobile communication technique (LTE-Advanced, 5G) that bundles several frequency bands to raise the speed
Key rule: A sensor converts a physical quantity into an electrical signal (input); an actuator converts an electrical signal into physical movement (output).
Hardware · AI-written, may contain errors
This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.