問84
頻出度★★☆
IoT 機器の記録装置としても用いられ, 記録媒体が半導体でできており物理的な駆動機構をもたないので, HDD と比較して低消費電力で耐衝撃性も高いものはどれか。
令和4年度 ITパスポート試験 問84
テクノロジ系コンピュータ構成要素 › メモリ
This question's explanation and your answers so far.
解説
問 84
Incorrectア
DRM (Digital Rights Management) is a general term for the technologies and mechanisms that protect the copyright of digital content and restrict unauthorized copying and use; it is not a storage device (hardware).
Incorrectイ
A DVD is an optical-disc storage medium in which the disc is spun by a motor and read and written with a laser beam. Because reading and writing require a drive with a mechanism that rotates the disc, it violates the condition of having no physical drive mechanism.
Incorrectウ
HDMI (High-Definition Multimedia Interface) is an interface standard and connector that transmits video and audio digitally; it is not a storage device that saves data.
- エ
正解 An SSD (Solid State Drive) is an auxiliary storage device that uses semiconductors such as flash memory as its storage medium. Unlike an HDD, it does not spin a magnetic disk and read or write with a motor and head, so it has no physical drive mechanism; this makes its power consumption low and its resistance to vibration and shock high. Being small and light, it is also used as the storage device in IoT equipment that requires shock resistance. The only choice that meets all the conditions in the question (semiconductor medium, no moving parts, low power, high shock resistance, IoT use) is SSD, choice エ.
ここがポイント
- An SSD uses semiconductors (flash memory) as its storage medium and has no moving parts, so it offers low power consumption, high shock resistance, quiet operation, and high speed; it is used to replace HDDs and as the storage device in IoT equipment.
- An HDD is a storage device with a drive mechanism that rotates a magnetic disk; the key exam point is to grasp its differences from an SSD (presence of moving parts, power consumption, shock resistance) through comparison.
用語