The UNIX operating system is made up of three parts; the kernel, the shell and the programs. The kernel of UNIX is the(71)of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to(72). Th

题目

The UNIX operating system is made up of three parts; the kernel, the shell and the programs. The kernel of UNIX is the(71)of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to(72). The shell acts as an(73)between the user and the kernel. When a user logs in, the(74)program checks the username and password, and then starts another program called the shell. The shell is a command line(75)(CLI). It interprets the commands the user types in and arranges for them to be carded out. The commands are themselves programs: when they terminate, the shell gives the user another prompt(% on our systems).

A.hub

B.center

C.core

D.nucleus


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更多“The UNIX operating system is made up of three parts; the kernel, the shell and the program ”相关问题
  • 第1题:

    DOS的英文表示是()。

    A、Disk、Operating、System

    B、Daily、Operating、System

    C、Disk、Open、System

    D、Date、Open、System


    参考答案:A

  • 第2题:

    Afilenamed"core"existsinthecurrentdirectory.Whichofthefollowingcommandsshouldbeusedtodeterminewhatcreatedthe"core"file?()

    A.dump-tcore

    B.stringscore

    C.trace-acore

    D.crashcore/unix_up


    参考答案:B

  • 第3题:

    Unix和Linux有很多种不同的外壳,称为Shell,如csh,ksh,bsh, bash等。


    UNIX虽然是一个安全、稳定且功能强大的操作系统,是对源代码实行知识产权保护的传统商业软件,但它也一直是一种大型的而且对运行平台要求很高的操作系统,只能在工作站或小型机上才能发挥全部功能,并且价格昂贵,对普通用户来说是可望而不可及的,Linux是一个类UNIX操作系统,是开发源代码的自由软件,免费、公开源代码的,可运行在多种硬件平台上。

  • 第4题:

    下列关于UNIX操作系统的说法,错误的是( )。

    A.UNIX采用进程对换的内存管理机制

    B.UNIX是由Shell语言编写的

    C.UNIX是多用户系统

    D.UNIX采用树形文件系统


    正确答案:B
    解析:UNIX的几个特点分别是:①UNIX是多用户、多任务的系统;②UNIX大部分是用C语言编写的;③提供了Shell编程语言;④提供了丰富的系统调用;⑤采用树形文件系统;⑥提供多种通信机制;⑦采用进程对换的内存管理。

  • 第5题:

    以下程序段的输出结果为( )。 int j=2 switch (j){ Case 2: system.out.print("two."): Case 2+1: System.out.println("three."); break: default: System.out.println (“value is”+j): Break }A.B.two

    A.two.three.

    B.two

    C.three

    D.value is 2


    正确答案:A

  • 第6题:

    Linux内核中的系统调用总数定义在哪个文件中()

    A.include/linux/sys.h

    B.kernel/system_call.s

    C.kernel/sys.c

    D.include/unistd.h


    从用户态存储区传送到内核态存储区