一、选择题

1、在现代操作系统中引入了（ ），从而使并发和共享成为可能。

A.单道程序 B. 磁盘 C. 对象 D.多道程序

2、( )操作系统允许在一台主机上同时连接多台终端，多个用户可以通过各自的终端同时交互地使用计算机。

A.网络 B.分布式 C.分时 D.实时

3、从用户的观点看，操作系统是（ ）。

A. 用户与计算机硬件之间的接口 B.控制和管理计算机资源的软件

C. 合理组织计算机工作流程的软件 D.计算机资源的的管理者

4、当CPU处于管态时，它可以执行的指令是（ ）。

A. 计算机系统中的全部指令 B. 仅限于非特权指令 C. 仅限于访管指令

-One, a multiple-choice questions, the introduction of modern operating systems (), so that concurrency and sharing become possible. A. Single-channel program B. disk C. Object D. program, () the operating system allows a host to connect multiple terminals, multiple users can use the computer interactively through the terminal at the same time. A. Network B. distributed C. timeshare D. Real-time, from the user' s point of view, the operating system (). A. user and the computer hardware interface between the B. Control and management of computer resources software C. rational organization of computer workflow software D. computer resources managers, it can execute instructions when the CPU is in the pipe state (). A. The computer system of all instructions B. limited to non-privileged instruction C. is limited to access pipe instruction