Cache作用是______。
- A.处理中断请求并实现内外存数据交换
- B.解决CPU与主存间速度匹配问题
- C.增加外存容量并提高外存访问速度
- D.增加主存容量并提高主存访问速度
正确答案及解析
正确答案
解析
在计算机存储系统层次结构中，高速缓冲存储器(Cache)是介于中央处理器和主存储器之间高速小容量存储器。它和主存储器一起构成一级存储器。Cache和主存储器之间信息调度和传送是由硬件自动进行。它主要用于解决CPU处理器与主存之间存取速度不匹配问题。
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