問58
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GPUの説明として, 適切なものはどれか。
平成28年度 秋期 ITパスポート試験 問58
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 58
Incorrectア
“An indicator that represents CPU processing capability by showing how many billions of instructions can be executed per second” describes not the device called a GPU, but a performance indicator that quantifies the CPU's processing speed (such as MIPS/GIPS, the number of instructions executed per second). A GPU is an arithmetic/processing unit, not an indicator, so this is wrong.
Incorrectイ
“A periodic signal used to synchronize the arithmetic/logic processing of a CPU” describes the clock (clock signal). The clock is a signal that aligns the internal operation timing of the CPU, and it is a different thing from a GPU, which is a device that performs image processing, so this is wrong.
Incorrectウ
“A storage device placed between the CPU and main memory that reads and writes faster than main memory” describes cache memory. This is a storage device, not a GPU that performs computation, so this is wrong.
- エ
正解 エ is correct. A GPU (Graphics Processing Unit) is an arithmetic/processing unit that performs, in place of the CPU, large amounts of parallel computation such as coordinate transformation, shading calculation, and image processing for 3D graphics, doing so in a specialized and high-speed way. It has a structure that processes huge numbers of simple calculations in parallel; originally it was intended to speed up screen rendering, but thanks to its parallel computing power it has in recent years also been used for general-purpose computation such as machine learning. The description in choice エ directly expresses this role, so it is an appropriate description of a GPU.
ここがポイント
- A GPU is a dedicated arithmetic/processing unit that performs, in place of the CPU, large amounts of parallel computation such as 3D graphics image processing at high speed, and in recent years it is also used for general-purpose computation.
- Distinguish the confusable terms around the CPU: a performance indicator (such as MIPS), the clock (a periodic signal for synchronization), and cache memory (a high-speed storage device) all have roles different from a GPU, which is an arithmetic/processing unit.
用語