2. 从业资格
  3. An operating system also has to be able

An operating system also has to be able

练习题库2022-08-02  79
问题 An operating system also has to be able to service peripheral（ ）,such as timers,motors,sensors,communicationdevices,disks,etc.All of those can request the attention of the OS（ ）,i.e.at the time that they want to use the OS,theOS has to make sure it's ready to service the requests.Such a request for attention is called an interrupt.There are twokinds of interrupts:Hardware interrupts and Software interrupts.The result of an inteiTup:is also a triggering of theprocessor,so that it jumps to a（请作答此空）address.Examples of cases where software interrupts appear are perhaps a divide by zero,a memory segmentation fault,etc.So this kind of interrupt is not caused by a hardware event but by a specificmachine language operation code.Many systems have more than one hardware interrupt line,and the hardwaremanufacturer typically assembles all these interrupt lines in an interrupt（ ）.An Interrupt（ ）is a piece of hardware that shields the OS from the electronic details of the interrupt lines,so that interrupts can be queued and none of themgets lost.A.randomB.pre-specifiedC.constantD.inknown
选项 A.random
B.pre-specified
C.constant
D.inknown
答案 B
解析
转载请注明原文地址:http://tihaiku.com/congyezige/2424337.html
本试题收录于： 中级 嵌入式系统设计师题库软件水平考试初中高级分类

中级 嵌入式系统设计师

软件水平考试初中高级

相关试题推荐
随机试题
最新回复(0)