問99
頻出度★☆☆
入力装置に関する次の記述中の a，b に入れる字句の適切な組合せはどれか。 a は，紙などに光を当て，反射光を読み取り，文字や図形をデジタルデータに変換して PC に取り込む。a が文字や図形をどの程度細かく読み取れるかの性能を示す単位として b が使われる。
令和8年度 ITパスポート試験 問99
This question's explanation and your answers so far.
解説
問 99
Incorrectア
The “Image Scanner” for a is correct, but the “bps” for b is wrong. bps stands for bits per second and is the unit for data transfer speed (communication speed); it does not indicate the fineness of reading (resolution).
- イ
正解 The correct answer is イ. The word for a is “Image Scanner”, an input device that shines light onto paper or similar media, reads the reflected light, and converts characters or figures into digital data to import them into a PC (Personal Computer). The word for b is “dpi”, which stands for dots per inch (the number of dots per inch) and is the unit that indicates how finely characters or figures can be read (i.e. the resolution). The larger the dpi value, the more finely it can read. Therefore イ, the combination of a = Image Scanner and b = dpi, is appropriate.
Incorrectウ
The “Screen Reader” for a is wrong. A screen reader is an assistive technology that reads aloud the text information displayed on the screen by voice (mainly on the output side); it is not an input device that optically reads paper. The “bps” for b is also not a unit of resolution, so it is wrong.
Incorrectエ
The “dpi” for b is correct as a unit of resolution, but the “Screen Reader” for a is wrong. A screen reader is an assistive technology that turns text on the screen into voice; it is not a device that shines light onto paper to read it, so it does not fit a in the description.
ここがポイント
- An image scanner is an input device that shines light onto paper or similar media, reads the reflected light, and digitizes characters or figures.
- dpi (dots per inch) is the number of dots per inch, a unit indicating the fineness of reading (resolution). bps is a unit of communication and transfer speed; do not confuse the two.
用語