An embedded operating system is the(71)program that manages all the other programs in an e
An embedded operating system is the(71)program that manages all the other programs in an embedded device after initial load of programs by a(an)(72). It normally guarantees a capability within a specified(73)size and(74)constraint as well as with application programs. It also n0rmalty has small foot print including initial boot loader, OS kernel, required device drivers,(75)for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.
A.hardware
B.business
C.software
D.external
解析:试题(71)分析:该题考查嵌入式操作系统的定义,嵌入式操作系统是在boot loader对嵌入式设备进行初始化引导启动后,管理运行在设备上的所有其他程序的软件。故C选择software符合嵌入式系统的定义,为该题的正确选项。
嵌入式操作系统是在引导装入程序(boot loader)对嵌入式设备进行初始化引导启动后,管理运行在设备上的所有其他程序的软件。嵌入式系统在实现应用程序的同时,能保证软件的存储空间和操作的时间满足一定的要求。嵌入式操作系统都较小,一般仅包含初始引导装入程序、操作系统内核、设备驱动程序和用于存储用户数据的文件系统。嵌入式系统与常见的操作系统在结构上非常相似,区分它们的主要因素有预安装设备、功能有限和仅执行特别设计的任务等。
试题(72)分析:该题考查嵌入式系统各个组成部分的功能定义,其中boot loader处于整个软件系统的底层,用于对硬件的初始化引导,相当于PC中的BIOS,故该题选项为D。
试题(73)分析:嵌入式系统在实现应用程序的同时,对软件的存储体积和操作的时间有一定的要求,故B选项storage符合对存储的定义,为正确答案。
试题(74)分析:嵌入式操作系统对程序运行的时间根据优先级的高低限定了时间,对其完成操作的时间进行了限制,保证这个系统的正常运行。故选项为A。
试题(75)分析:嵌入式操作系统中包含设备驱动程序和文件系统,后者用于对用户数据和其他文件的存储。故选择为C。
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