平成28年度春期 ITパスポート試験問72

This question's explanation and your answers so far.

問72

頻出度★★☆

機械的な可動部分が無く, 電力消費も少ないという特徴をもつ補助記憶装置はどれか。

出典　平成28年度春期 ITパスポート試験問72

解説

問 72

Incorrectア
A CD-RW drive is an optical disc device that reads and writes by spinning the disc with a motor while moving the optical pickup (laser head); it has mechanical moving parts. Because it must drive these moving parts, its power consumption is also greater than that of an SSD, so it does not meet the conditions.
Incorrectイ
Like the CD-RW, a DVD drive is also an optical disc device with mechanical moving parts, namely the spinning disc and the moving optical head, so it does not satisfy the condition of “having no moving parts.”
Incorrectウ
An HDD (Hard Disk Drive) is a device that reads and writes by spinning magnetic disks (platters) at high speed and moving magnetic heads; it is a secondary storage device with typical mechanical moving parts. Because it is motor-driven, its power consumption is also high, so it does not meet the conditions.
エ
正解 An SSD (Solid State Drive) is a secondary storage device that uses flash memory as its storage medium, and it has no mechanical moving parts inside, such as a motor to spin a disk or read/write heads. Because it is built from semiconductors only, it needs no power to drive moving parts, so its power consumption is low and it also offers excellent shock resistance and quiet operation. Therefore, the option that matches the characteristics of “having no mechanical moving parts and low power consumption” is “エ,” the SSD.

ここがポイント

An SSD is built from flash memory (semiconductors) and has the characteristics of no moving parts, low power consumption, shock resistance, and quiet operation. In contrast, HDDs and optical discs (CD/DVD) have mechanical moving parts such as rotation or movement of the optical head.
If secondary storage devices are classified by “whether they have mechanical moving parts,” the SSD falls into the non-moving (semiconductor) category, while the HDD, CD-RW, and DVD fall into the moving (mechanical) category.

用語

解答問72エ