問57
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デュアルコアプロセッサに関する記述として, 適切なものはどれか。
平成29年度 春期 ITパスポート試験 問57
テクノロジ系コンピュータ構成要素 › プロセッサ
This question's explanation and your answers so far.
解説
問 57
Incorrectア
Installing two operating systems on a single PC so that it can boot from either OS at startup describes “dual boot (multi-boot),” which has nothing to do with the structure of the processor.
Incorrectイ
Using two displays spanning together as one wide screen describes “multi-display (extended desktop),” which has nothing to do with the number of CPU cores.
Incorrectウ
Pairing two memory modules of the same specification and capacity into one set and accessing them simultaneously to raise transfer speed describes “dual channel,” a memory-side speed-up technique, not a matter of processor cores.
- エ
正解 A “dual core” refers to a configuration in which two processing units called “cores” are mounted inside a single LSI package (one CPU chip). Choice エ states exactly that “two processors' integrated circuits are implemented within a single LSI package, and each can execute its own separate instructions simultaneously,” which matches this definition precisely. Because there are two cores, two tasks can run in parallel, improving performance. Processors that have multiple cores are collectively called multi-core processors, and the one with two cores is a dual core.
ここがポイント
- A core is a processing unit inside the CPU. A package that carries multiple cores is a multi-core processor, and one with two cores is a dual core. Each core can execute its own separate instructions in parallel at the same time.
- Do not confuse it with similar “dual/multi ...” terms (dual boot = two operating systems, multi-display = two screens, dual channel = simultaneous access to two memory modules).
用語