令和5年度 ITパスポート試験問88

This question's explanation and your answers so far.

問88

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読出し専用の DVD はどれか。

出典　令和5年度 ITパスポート試験問88

解説

問 88

Incorrectア
The “R” in DVD-R stands for Recordable — a write-once medium onto which data can be written only one time. Because users can record data themselves, it is not read-only.
Incorrectイ
The “RAM” in DVD-RAM stands for Random Access Memory — a medium that can be rewritten (erased and re-recorded) repeatedly. It is not read-only.
ウ
正解 The correct answer is ウ, DVD-ROM. ROM stands for “Read Only Memory,” meaning data is recorded at manufacturing time; users can only read it and cannot write to it or erase it. It is used as a distribution medium for commercial movie titles and software — exactly a read-only DVD.
Incorrectエ
The “RW” in DVD-RW stands for ReWritable — a medium that can be rewritten repeatedly. It is not read-only.

ここがポイント

A DVD's type, and thus its write characteristics, can be read from the suffix: ROM = read-only, R = write-once, RAM and RW = rewritable repeatedly.
If you keep in mind the basic correspondence “ROM = Read Only Memory = read-only,” you can identify the answer.

用語

解答問88ウ