Applications put computers to practical business (67) , but below the (68) it’s the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store (69) .
A traditional kernel provides all the functions for applications. The kernel (70) memory, I/0 devices and parcels out processor time.
The kernel also supports security and fault (71) , which is the ability to recover automatically when parts of the system fail.
A.error
B.question
C.tolerance
D.problem
参考答案:C
解析: 计算机被应用到实际的商业用途中,但在它的内部是一个操作系统的核心,它提供了多重程序技术,并且连接网络,储存数据。
一个传统的核心提供应用程序的所有功能,它处理记忆功能,输入/输出设备,并分配处理器的时间。
这个核心支持安全和容错能力,当系统部分失灵时能够自动恢复。