以下关于计算机系统中高速缓存（Cache)的说法中，正确的是( )。
- A.Cache的容量通常大于主存的存储容量
- B.通常由程序员设置Cache的内容和访问速度
- C.Cache的内容是主存内容的副本
- D.多级Cache仅在多核CPU中使用
正确答案及解析
正确答案
解析
高速缓冲存储器是存在于主存与CPU之间的一级存储器，由静态存储芯片（SRAM）组成，容量比较小但速度比主存高得多，接近于CPU的速度。Cache通常保存着一份内存储器中部分内容的副本（拷贝），该内容副本是最近曾被CPU使用过的数据和程序代码。
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