問81
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CPU の性能に関する記述のうち, 適切なものはどれか。
令和4年度 ITパスポート試験 問81
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 81
- ア
正解 ア is correct. The bit count of a CPU, such as 32-bit or 64-bit, represents the length of data (bit width) that the CPU can process at one time. A 64-bit CPU can handle 64 bits at once, twice that of a 32-bit CPU, so it can process a larger data length at one time and is more advantageous for computing larger numbers and handling a wider memory space. Therefore, the statement that a 64-bit CPU can process a larger data length at one time is appropriate.
Incorrectイ
It is the opposite. Cache memory is a high-speed buffer that reduces accesses to the slower main memory; the larger its capacity, the higher the hit rate, the fewer times it waits for main memory, and the higher the processing speed. The statement that a smaller capacity makes it faster is incorrect.
Incorrectウ
It is the opposite. The clock frequency represents the number of operations per second (the beat); for a CPU of the same structure, the higher the frequency, the more instructions can be executed per unit time and the higher the processing speed. Lowering the frequency lowers the processing speed, so the statement is incorrect.
Incorrectエ
It is the opposite. A core is the central part that executes processing, and the number of processes that can run simultaneously corresponds to the number of cores. A quad-core (4 cores) has more cores than a dual-core (2 cores), so it can execute a larger number of processes simultaneously. The statement that the dual-core can execute more is incorrect.
ここがポイント
- The bit count of a CPU (32/64-bit) represents the length of data (bit width) it can process at one time; the larger it is, the larger the data it can handle at once.
- The basic principles of CPU processing speed are: the higher the clock frequency the faster, the larger the cache capacity the faster, and the more cores the greater the number of simultaneous processes.
用語