(单选题) 1: 发生死锁的必要条件有四个,要防止死锁的发生,可以破坏这四个必要条件,但破坏()条件是不太实际的。 A: 互斥 B: 请求和保持 C: 不剥夺 D: 循环等待 正确答案: (单选题) 2: 在执行P操作时,进程若能继续执行,执行P操作前信号量的值应()。 A: 大于0 B:...

(单选题) 1: 以下功能中()不是操作系统具备的主要功能。 A: 内存管理 B: 中断处理 C: Word编辑 D: CPU调度 正确答案: (单选题) 2: LINUX操作系统是()。 A: 硬件 B: 系统软件 C: 应用软件 D: 虚拟机 正确答案: (单选题) 3: 操作系统(简称OS)是对()进行管理的软...

(单选题) 1: 外部设备与主存直接进行数据交换而不需要CPU的直接干预,这种数据交换方式是()。 A: 程序直接控制方式 B: 中断方式 C: DMA方式 D: 无条件存取方式 正确答案: (单选题) 2: 操作系统中的SPOOL技术,实质是将()转化为共享设备的技术。 A: 虚拟设备 B:...

(单选题) 1: 在分时操作系统中,短程调度经常采用()调度算法。 A: 先进先出 B: 优先级 C: 时间片轮转 D: 随机 正确答案: (单选题) 2: 一般情况下,系统出现死锁的原因是()。 A: 计算机系统发生了重大故障 B: 有多个封锁的进程同时存在 C: 若干进程因竞争资源而...

(单选题) 1: 以用户的角度出发,操作系统是()。 A: 用户与计算机之间的接口 B: 控制和管理计算机资源的软件 C: 合理地组织计算机工作流程的软件 D: 由若干层次的程序按一定的结构组成的有机体 正确答案: (单选题) 2: 当中央处理器处于核心态时,它可以执行的指...

(单选题) 1: Each boy and each girl _________ given a gift on Christmas Day. A: is B: are C: were D: be 正确答案: (单选题) 2: As Commander-in-Chief of the armed force, I have directed that all measures ______ for our defense. A: had been tak...

(单选题) 1: Standing under a big tree to _______ getting wet in a rain is not a good choice. This is especially true when it is the thunderstorm reason. A: avoid B: keep C: stop D: drop 正确答案: (单选题) 2: Answers which are hard to read b...

(单选题) 1: You are late. If you ()a few minutes earlier, you ()him. A: come; would meet B: had come; would have met C: come; will meet D: had come; would meet 正确答案: (单选题) 2: Common interests have formed a _______ between us, which m...

(单选题) 1: Don't worry. There's still ________ time to go. A: little B: a little C: few D: a few 正确答案: (单选题) 2: What was needed to appeal to the floating voters was the ability to ________ them with a sense of conviction. A: aspire...

(单选题) 1: European football is played in 80 countries, ______ it the most popular sport in the world. A: making B: makes C: made D: to make 正确答案: (单选题) 2: Mother doesn't know much time I have spent in watching TV; if she ever found...