問50
頻出度★☆☆
ホットプラグの説明として，適切なものはどれか。
平成27年度 秋期 ITパスポート試験 問50
テクノロジ系コンピュータ構成要素 › 入出力デバイス
This question's explanation and your answers so far.
解説
問 50
- ア
正解 Hot plugging is a feature that lets peripheral devices be connected or detached while the PC remains powered on (still running). USB is a representative example; being able to plug in or unplug a mouse or a USB flash drive without shutting down relies on this mechanism. Choice ア states exactly this meaning, so it is correct.
Incorrectイ
“Software incorporated afterward to enhance the functionality of an application” describes a plug-in (add-on). It concerns additional software functionality and has nothing to do with hot plugging, which refers to attaching or detaching devices while the power stays on.
Incorrectウ
“A mechanism that supplies power from the PC to peripheral devices through the connecting cable” describes bus power (such as USB bus power). It concerns power supply, not the function itself of attaching or detaching devices while they are running.
Incorrectエ
“A method that runs a specific program and evaluates performance by the time the processing takes” describes a benchmark. It is a performance-measurement technique and an entirely different concept from the function of attaching or detaching peripheral devices.
ここがポイント
- Hot plugging = a feature for attaching or detaching peripheral devices while the power stays on (during operation). Understand it together with USB and Plug and Play.
- Distinguishing it from confusable terms: plug-in (add-on software), bus power (cable-based power supply), and benchmark (performance-evaluation technique) are each a different concept.
用語