問92
頻出度★☆☆
PCなどの仕様の表記として, SXGA や QVGA などが用いられるものはどれか。
平成30年度 秋期 ITパスポート試験 問92
This question's explanation and your answers so far.
解説
問 92
Incorrectア
The clock frequency of the CPU is a quantity expressing the number of operations per second, and its unit is Hz (GHz, MHz). It is not expressed with resolution-standard names such as SXGA or QVGA.
Incorrectイ
The diameter of the HDD disk (platter) is expressed in inch units, such as “2.5-inch” or “3.5-inch”. SXGA and QVGA are standard names expressing pixel counts, so they do not apply.
- ウ
正解 SXGA and QVGA are names of “resolution standards” that express the number of pixels (pixel) making up the screen, given as width × height. Starting from VGA (640×480) as the reference, QVGA refers to a quarter of VGA (Quarter=320×240), and SXGA refers to a higher-grade standard than VGA (Super XGA=1280×1024). Notations such as SXGA and QVGA are used for the resolution of the display, so the correct answer is “ウ”.
Incorrectエ
The capacity of the memory is an amount of data, so it is expressed in byte units such as GB or MB. Resolution-standard names such as SXGA or QVGA are not used.
ここがポイント
- SXGA, QVGA, VGA, XGA, UXGA, and the like are names of display resolution standards that express the number of pixels on the screen as width × height (e.g., VGA=640×480, QVGA=320×240, SXGA=1280×1024).
- In PC specification notation, distinguish that each quantity uses a different unit (clock frequency = Hz, storage capacity = bytes, disk diameter = inches, resolution = pixel-count standard names).
用語